900 (nine hundred) is the

natural number In mathematics, the natural numbers are the numbers 0, 1, 2, 3, and so on, possibly excluding 0. Some start counting with 0, defining the natural numbers as the non-negative integers , while others start with 1, defining them as the positive in ...

following 899 and preceding 901. It is the

square In geometry, a square is a regular polygon, regular quadrilateral. It has four straight sides of equal length and four equal angles. Squares are special cases of rectangles, which have four equal angles, and of rhombuses, which have four equal si ...

of 30 and the sum of

Euler's totient function In number theory, Euler's totient function counts the positive integers up to a given integer that are relatively prime to . It is written using the Greek letter phi as \varphi(n) or \phi(n), and may also be called Euler's phi function. In ot ...

for the first 54

positive integer In mathematics, the natural numbers are the numbers 0, 1, 2, 3, and so on, possibly excluding 0. Some start counting with 0, defining the natural numbers as the non-negative integers , while others start with 1, defining them as the positiv ...

s. In base 10, it is a

Harshad number In mathematics, a harshad number (or Niven number) in a given radix, number base is an integer that is divisible by the digit sum, sum of its digits when written in that base. Harshad numbers in base are also known as -harshad (or -Niven) numbers ...

. It is also the first number to be the square of a

sphenic number In number theory, a sphenic number (from , 'wedge') is a positive integer that is the product of three distinct prime numbers. Because there are infinitely many prime numbers, there are also infinitely many sphenic numbers. Definition A sphenic ...

In other fields

900 is also: * A telephone

area code A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. Telephone numbers are the addresses of participants in a telephone network, rea ...

for "premium" telephone calls in the

North American Numbering Plan The North American Numbering Plan (NANP) is an integrated telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1, World Numbering Zone ...

(900 number) * In Greek number symbols, the sign

Sampi Sampi (modern: ϡ; ancient shapes: , ) is an Archaic Greek alphabets, archaic letter of the Greek alphabet. It was used as an addition to the classical 24-letter alphabet in some eastern Ionic Greek, Ionic dialects of ancient Greek in the 6th a ...

("ϡ", literally "like a pi") * A

skateboarding trick A skateboarding trick, or simply a trick, is a maneuver performed by manipulating a skateboard, usually with one's feet, in a specific way to achieve the desired outcome – the trick. History Though skateboards emerged in the 1900s, skateboardi ...

in which the skateboarder spins two and a half times (360 degrees times 2.5 is 900) * A 900 series refers to three consecutive perfect games in

bowling Bowling is a Throwing sports#Target sports, target sport and recreational activity in which a player rolls a bowling ball, ball toward Bowling pin, pins (in pin bowling) or another target (in target bowling). Most references to ''bowling'' are ...

* Yoda's age in

Star Wars ''Star Wars'' is an American epic film, epic space opera media franchise created by George Lucas, which began with the Star Wars (film), eponymous 1977 film and Cultural impact of Star Wars, quickly became a worldwide popular culture, pop cu ...

Integers from 901 to 999

900s

* 901 = 17 × 53, centered triangular number,

happy number In number theory, a happy number is a number which eventually reaches 1 when the number is replaced by the sum of the square of each digit. For instance, 13 is a happy number because 1^2+3^2=10, and 1^2+0^2=1. On the other hand, 4 is not a happy ...

* 902 = 2 × 11 × 41,

nontotient In number theory, a nontotient is a positive integer ''n'' which is not a totient number: it is not in the range of Euler's totient function φ, that is, the equation φ(''x'') = ''n'' has no solution ''x''. In other words, ''n'' is a nontotie ...

, Harshad number * 903 = 3 × 7 × 43, sphenic number, 42nd

triangular number A triangular number or triangle number counts objects arranged in an equilateral triangle. Triangular numbers are a type of figurate number, other examples being square numbers and cube numbers. The th triangular number is the number of dots in ...

, Schröder–Hipparchus number, Mertens function(903) returns 0, little Schroeder number * 904 = 2³ × 113 or 113 × 8, refactorable number, Mertens function(904) returns 0, lazy caterer number, number of 1's in all partitions of 26 into odd parts * 905 = 5 × 181, sum of seven consecutive primes (109 + 113 + 127 + 131 + 137 + 139 + 149), smallest composite de Polignac number ** "The 905" is a common nickname for the suburban portions of the

Greater Toronto Area The Greater Toronto Area, commonly referred to as the GTA, includes the Toronto, City of Toronto and the regional municipality, regional municipalities of Regional Municipality of Durham, Durham, Regional Municipality of Halton, Halton, Regional ...

in Canada, a region whose telephones used area code 905 before

overlay plan In telecommunications, an area code overlay complex is a telephone numbering plan that assigns multiple area codes to the same geographic numbering plan area (NPA). Area code overlays are implemented in territories of the North American Numbe ...

s added two more area codes. * 906 = 2 × 3 × 151, strobogrammatic, sphenic number, Mertens function(906) returns 0 * 907 = prime number * 908 = 2² × 227, nontotient, number of primitive sorting networks on 6 elements, number of rhombic tilings of a 12-gon * 909 = 3² × 101, number of non-isomorphic aperiodic multiset partitions of weight 7

910s

* 910 = 2 × 5 × 7 × 13, Mertens function(910) returns 0, Harshad number,

, balanced number, number of polynomial symmetric functions of matrix of order 7 under separate row and column permutations *

911 911, 9/11 or Nine Eleven may refer to: Dates * AD 911 * 911 BC * September 11 ** The 2001 September 11 attacks on the United States by al-Qaeda, commonly referred to as 9/11 ** 11 de Septiembre, Chilean coup d'état in 1973 that ousted the ...

Sophie Germain Marie-Sophie Germain (; 1 April 1776 – 27 June 1831) was a French mathematician, physicist, and philosopher. Despite initial opposition from her parents and difficulties presented by society, she gained education from books in her father's lib ...

prime number, also the

emergency telephone number An emergency telephone number is a number that allows a caller to contact local emergency services for assistance. The emergency number differs from country to country; it is typically a three-digit number so that it can be easily remembered and ...

in North America, also the terrorist attack in the United States in 2001. * 912 = 2⁴ × 3 × 19, sum of four consecutive primes (223 + 227 + 229 + 233), sum of ten consecutive primes (71 + 73 + 79 + 83 + 89 + 97 + 101 + 103 + 107 + 109), Harshad number. * 913 = 11 × 83, Smith number, Mertens function(913) returns 0. * 914 = 2 × 457, nontotient, number of compositions of 11 that are neither weakly increasing nor weakly decreasing * 915 = 3 × 5 × 61, sphenic number, Smith number, Mertens function(915) returns 0, Harshad number * 916 = 2² × 229, Mertens function(916) returns 0, nontotient, strobogrammatic, member of the

Mian–Chowla sequence In mathematics, the Mian–Chowla sequence is an integer sequence defined recursively in the following way. The sequence starts with :a_1 = 1. Then for n>1, a_n is the smallest integer such that every pairwise sum :a_i + a_j is distinct, for ...

* 917 = 7 × 131, sum of five consecutive primes (173 + 179 + 181 + 191 + 193) * 918 = 2 × 3³ × 17, Harshad number * 919 = prime number, cuban prime, prime index prime,

Chen prime In mathematics, a prime number ''p'' is called a Chen prime if ''p'' + 2 is either a prime or a product of two primes (also called a semiprime). The even number 2''p'' + 2 therefore satisfies Chen's theorem. The Chen primes are named a ...

palindromic prime In mathematics, a palindromic prime (sometimes called a palprime) is a prime number that is also a palindromic number. Palindromicity depends on the base of the number system and its notational conventions, while primality is independent of such ...

centered hexagonal number In mathematics and combinatorics, a centered hexagonal number, or centered hexagon number, is a centered polygonal number, centered figurate number that represents a hexagon with a dot in the center and all other dots surrounding the center dot ...

, Mertens function(919) returns 0

920s

* 920 = 2³ × 5 × 23, Mertens function(920) returns 0, total number of nodes in all rooted trees with 8 nodes * 921 = 3 × 307, number of enriched r-trees of size 7 * 922 = 2 × 461, nontotient, Smith number * 923 = 13 × 71, number of combinations of 6 things from 1 to 6 at a time * 924 = 2² × 3 × 7 × 11, sum of a twin prime (461 + 463),

central binomial coefficient In mathematics the ''n''th central binomial coefficient is the particular binomial coefficient : = \frac \textn \geq 0. They are called central since they show up exactly in the middle of the even-numbered rows in Pascal's triangle. The first ...

\tbinom  6

* 925 = 5² × 37,

pentagonal number A pentagonal number is a figurate number that extends the concept of triangular number, triangular and square numbers to the pentagon, but, unlike the first two, the patterns involved in the construction of pentagonal numbers are not rotational ...

centered square number In elementary number theory, a centered square number is a Centered polygonal number, centered figurate number that gives the number of dots in a Square (geometry), square with a dot in the center and all other dots surrounding the center dot i ...

** The millesimal fineness number for

Sterling silver Sterling silver is an alloy composed mass fraction (chemistry), by weight of 92.5% silver and 7.5% other metals, usually copper. The sterling silver silver standards, standard has a minimum millesimal fineness of 925. ''Fineness, Fine silver'' ...

* 926 = 2 × 463, sum of six consecutive primes (139 + 149 + 151 + 157 + 163 + 167), nontotient * 927 = 3² × 103, tribonacci number * 928 = 2⁵ × 29, sum of four consecutive primes (227 + 229 + 233 + 239), sum of eight consecutive primes (101 + 103 + 107 + 109 + 113 + 127 + 131 + 137),

* 929 = prime number, Proth prime, palindromic prime, sum of nine consecutive primes (83 + 89 + 97 + 101 + 103 + 107 + 109 + 113 + 127),

Eisenstein prime In mathematics, the Eisenstein integers (named after Gotthold Eisenstein), occasionally also known as Eulerian integers (after Leonhard Euler), are the complex numbers of the form : z = a + b\omega , where and are integers and : \omega = \frac ...

with no imaginary part ** An area code in New York.

930s

* 930 = 2 × 3 × 5 × 31,

pronic number A pronic number is a number that is the product of two consecutive integers, that is, a number of the form n(n+1).. The study of these numbers dates back to Aristotle. They are also called oblong numbers, heteromecic numbers,. or rectangular number ...

* 931 = 7² × 19; sum of three consecutive primes (307 + 311 + 313); double

repdigit In recreational mathematics, a repdigit or sometimes monodigit is a natural number composed of repeated instances of the same digit in a positional number system (often implicitly decimal). The word is a portmanteau of "repeated" and "digit". Ex ...

, 111₃₀ and 777₁₁; number of regular simple graphs spanning 7 vertices * 932 = 2² × 233, number of regular simple graphs on 7 labeled nodes * 933 = 3 × 311 * 934 = 2 × 467, nontotient * 935 = 5 × 11 × 17, sphenic number, Lucas–Carmichael number, Harshad number * 936 = 2³ × 3² × 13, pentagonal pyramidal number, Harshad number * 937 = prime number, Chen prime,

star number In mathematics, a star number is a centered figurate number, a centered hexagram (six-pointed star), such as the Star of David, or the board Chinese checkers is played on. The ''n''th star number is given by the formula ''Sn'' = 6''n''(''n' ...

* 938 = 2 × 7 × 67, sphenic number, nontotient, number of lines through at least 2 points of an 8 × 8 grid of points * 939 = 3 × 313, number of V-toothpicks after 31 rounds of the honeycomb sequence

940s

* 940 = 2² × 5 × 47, totient sum for first 55 integers * 941 = prime number, sum of three consecutive primes (311 + 313 + 317), sum of five consecutive primes (179 + 181 + 191 + 193 + 197), Chen prime, Eisenstein prime with no imaginary part * 942 = 2 × 3 × 157, sphenic number, sum of four consecutive primes (229 + 233 + 239 + 241), nontotient, convolved Fibonacci number * 943 = 23 × 41 * 944 = 2⁴ × 59, nontotient, Lehmer-Comtet number * 945 = 3³ × 5 × 7,

double factorial In mathematics, the double factorial of a number , denoted by , is the product of all the positive integers up to that have the same Parity (mathematics), parity (odd or even) as . That is, n!! = \prod_^ (n-2k) = n (n-2) (n-4) \cdots. Restated ...

of 9, smallest odd

abundant number In number theory, an abundant number or excessive number is a positive integer for which the sum of its proper divisors is greater than the number. The integer 12 is the first abundant number. Its proper divisors are 1, 2, 3, 4 and 6 for a total ...

(proper divisors add up to more than 975); smallest odd primitive abundant number; smallest odd

primitive semiperfect number Primitive may refer to: Mathematics * Primitive element (field theory) * Primitive element (finite field) * Primitive cell (crystallography) * Primitive notion, axiomatic systems * Primitive polynomial (disambiguation), one of two concepts * Primi ...

; Leyland number * 946 = 2 × 11 × 43, sphenic number, 43rd

hexagonal number A hexagonal number is a figurate number. The ''n''th hexagonal number ''h'n'' is the number of ''distinct'' dots in a pattern of dots consisting of the ''outlines'' of regular hexagons with sides up to n dots, when the hexagons are overlaid so ...

* 947 = prime number, sum of seven consecutive primes (113 + 127 + 131 + 137 + 139 + 149 + 151),

balanced prime In number theory, a balanced prime is a prime number with equal-sized prime gaps above and below it, so that it is equal to the arithmetic mean of the nearest primes above and below. Or to put it algebraically, the nth prime number p_n is a balanced ...

, lazy caterer number,

with no imaginary part * 948 = 2² × 3 × 79, nontotient, forms a Ruth–Aaron pair with 949 under second definition, number of combinatory separations of normal multisets of weight 6. * 949 = 13 × 73, forms a Ruth–Aaron pair with 948 under second definition

950s

* 950 = 2 × 5² × 19, nontotient, generalized pentagonal number ** one of two

ISBN The International Standard Book Number (ISBN) is a numeric commercial book identifier that is intended to be unique. Publishers purchase or receive ISBNs from an affiliate of the International ISBN Agency. A different ISBN is assigned to e ...

Group Identifiers for books published in

Argentina Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourt ...

* 951 = 3 × 317, centered pentagonal number ** one of two ISBN Group Identifiers for books published in Finland * 952 = 2³ × 7 × 17, number of reduced words of length 3 in the Weyl group D_17, number of regions in regular tetradecagon with all diagonals drawn. ** 952 is also '' 9-5-2,'' a

card game A card game is any game that uses playing cards as the primary device with which the game is played, whether the cards are of a traditional design or specifically created for the game (proprietary). Countless card games exist, including famil ...

similar to

bridge A bridge is a structure built to Span (engineering), span a physical obstacle (such as a body of water, valley, road, or railway) without blocking the path underneath. It is constructed for the purpose of providing passage over the obstacle, whi ...

. ** one of two ISBN Group Identifiers for books published in Finland * 953 = prime number, Sophie Germain prime, Chen prime, Eisenstein prime with no imaginary part,

centered heptagonal number A centered heptagonal number is a centered figurate number that represents a heptagon with a dot in the center and all other dots surrounding the center dot in successive heptagonal layers. The centered heptagonal number for ''n'' is given by ...

** ISBN Group Identifier for books published in

Croatia Croatia, officially the Republic of Croatia, is a country in Central Europe, Central and Southeast Europe, on the coast of the Adriatic Sea. It borders Slovenia to the northwest, Hungary to the northeast, Serbia to the east, Bosnia and Herze ...

* 954 = 2 × 3² × 53, sum of ten consecutive primes (73 + 79 + 83 + 89 + 97 + 101 + 103 + 107 + 109 + 113), nontotient, Harshad number, sixth derivative of x^(x^x) at x=1. ** ISBN Group Identifier for books published in Bulgaria. Also one of the

Area Codes A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. Telephone numbers are the addresses of participants in a telephone network, reach ...

in the

South Florida South Florida, sometimes colloquially shortened to SoFlo, is the Regions of the United States#Florida, southernmost region of the U.S. state of Florida. It is one of Florida's three most commonly referred to directional regions; the two others are ...

Area * 955 = 5 × 191, number of transitive rooted trees with 17 nodes ** ISBN Group Identifier for books published in Sri Lanka * 956 = 2² × 239, number of compositions of 13 into powers of 2. ** ISBN Group Identifier for books published in Chile * 957 = 3 × 11 × 29, sphenic number, antisigma(45) ** one of two ISBN Group Identifiers for books published in Taiwan and China * 958 = 2 × 479, nontotient, Smith number ** ISBN Group Identifier for books published in

Colombia Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuel ...

** The millesimal fineness number for Britannia silver * 959 = 7 × 137, composite de Polignac number ** ISBN Group Identifier for books published in Cuba

960s

* 960 = 2⁶ × 3 × 5, sum of six consecutive primes (149 + 151 + 157 + 163 + 167 + 173), Harshad number ** country calling code for Maldives, ISBN Group Identifier for books published in Greece ** The number of possible starting positions for the chess variant

Chess960 Chess960, also known as Fischer Random Chess, is a chess variant that randomizes the starting position of the pieces on the back rank. It was introduced by former world chess champion Bobby Fischer in 1996 to reduce the emphasis on opening prepa ...

* 961 = 31², the largest 3-digit perfect square, sum of three consecutive primes (313 + 317 + 331), sum of five consecutive primes (181 + 191 + 193 + 197 + 199),

centered octagonal number A centered octagonal number is a centered number, centered figurate number that represents an octagon with a dot in the center and all other dots surrounding the center dot in successive octagonal layers.. The centered octagonal numbers are th ...

** country calling code for Lebanon, ISBN Group Identifier for books published in

Slovenia Slovenia, officially the Republic of Slovenia, is a country in Central Europe. It borders Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the south and southeast, and a short (46.6 km) coastline within the Adriati ...

* 962 = 2 × 13 × 37, sphenic number, nontotient ** country calling code for Jordan, one of two ISBN Group Identifiers for books published in Hong Kong * 963 = 3² × 107, sum of the first twenty-four primes ** country calling code for Syria, ISBN Group Identifier for books published in Hungary * 964 = 2² × 241, sum of four consecutive primes (233 + 239 + 241 + 251), nontotient, totient sum for first 56 integers ** country calling code for Iraq, ISBN Group Identifier for books published in Iran,

* 965 = 5 × 193 ** country calling code for Kuwait, ISBN Group Identifier for books published in Israel * 966 = 2 × 3 × 7 × 23 =

\left\

, sum of eight consecutive primes (103 + 107 + 109 + 113 + 127 + 131 + 137 + 139), Harshad number ** country calling code for Saudi Arabia, one of two ISBN Group Identifiers for books published in Ukraine * 967 = prime number, prime index prime ** country calling code for Yemen, one of two ISBN Group Identifiers for books published in Malaysia * 968 = 2³ × 11², nontotient, Achilles number, area of a square with diagonal 44 ** country calling code for Oman, one of two ISBN Group Identifiers for books published in Mexico * 969 = 3 × 17 × 19, sphenic number, nonagonal number,

tetrahedral number A tetrahedral number, or triangular pyramidal number, is a figurate number that represents a pyramid (geometry), pyramid with a triangular base and three sides, called a tetrahedron. The th tetrahedral number, , is the sum of the first triangular ...

** ISBN Group Identifier for books published in Pakistan, age of

Methuselah Methuselah (; ''Məṯūšélaḥ'', in pausa ''Məṯūšālaḥ'', "His death shall send" or "Man of the javelin" or "Death of sword"; ''Mathousalas'') was a biblical patriarch and a figure in Judaism, Christianity, and Islam. He is clai ...

according to Old Testament, anti-Muslim movement in Myanmar

970s

* 970 = 2 × 5 × 97, sphenic number, heptagonal number ** country calling code for Palestinian territories, one of two ISBN Group Identifiers for books published in Mexico * 971 = prime number, Chen prime, Eisenstein prime with no imaginary part ** country calling code for United Arab Emirates, ISBN Group Identifier for books published in the Philippines * 972 = 2² × 3⁵, Harshad number, Achilles number ** country calling code for Israel, one of two ISBN Group Identifiers for books published in Portugal *** The Sum of Anti-Factors of 972 = number * (n/2) where n is an Odd number. So, it is a Hemi-Anti-Perfect Number. Other such Numbers include 2692, etc. 972 has Anti-Factors = 5, 8, 24, 29, 67, 72, 216, 389, 648 Sum of Anti-Factors = 5 + 8 + 24 + 29 + 67 + 72 + 216 + 389 + 648 = 1458 = 972 * 3/2 * 973 = 7 × 139,

** country calling code for Bahrain, ISBN Group Identifier for books published in Romania, * 974 = 2 × 487, nontotient, 974! - 1 is prime ** country calling code for Qatar, ISBN Group Identifier for books published in Thailand * 975 = 3 × 5² × 13 ** country calling code for Bhutan, ISBN Group Identifier for books published in Turkey * 976 = 2⁴ × 61, decagonal number ** country calling code for Mongolia, ISBN Group Identifier for books published in

Antigua Antigua ( ; ), also known as Waladli or Wadadli by the local population, is an island in the Lesser Antilles. It is one of the Leeward Islands in the Caribbean region and the most populous island of the country of Antigua and Barbuda. Antigua ...

Bahamas The Bahamas, officially the Commonwealth of The Bahamas, is an archipelagic and island country within the Lucayan Archipelago of the Atlantic Ocean. It contains 97 per cent of the archipelago's land area and 88 per cent of its population. ...

Barbados Barbados, officially the Republic of Barbados, is an island country in the Atlantic Ocean. It is part of the Lesser Antilles of the West Indies and the easternmost island of the Caribbean region. It lies on the boundary of the South American ...

Belize Belize is a country on the north-eastern coast of Central America. It is bordered by Mexico to the north, the Caribbean Sea to the east, and Guatemala to the west and south. It also shares a maritime boundary with Honduras to the southeast. P ...

Cayman Islands The Cayman Islands () is a self-governing British Overseas Territories, British Overseas Territory, and the largest by population. The territory comprises the three islands of Grand Cayman, Cayman Brac and Little Cayman, which are located so ...

Dominica Dominica, officially the Commonwealth of Dominica, is an island country in the Caribbean. It is part of the Windward Islands chain in the Lesser Antilles archipelago in the Caribbean Sea. The capital, Roseau, is located on the western side of t ...

Grenada Grenada is an island country of the West Indies in the eastern Caribbean Sea. The southernmost of the Windward Islands, Grenada is directly south of Saint Vincent and the Grenadines and about north of Trinidad and Tobago, Trinidad and the So ...

Guyana Guyana, officially the Co-operative Republic of Guyana, is a country on the northern coast of South America, part of the historic British West Indies. entry "Guyana" Georgetown, Guyana, Georgetown is the capital of Guyana and is also the co ...

Jamaica Jamaica is an island country in the Caribbean Sea and the West Indies. At , it is the third-largest island—after Cuba and Hispaniola—of the Greater Antilles and the Caribbean. Jamaica lies about south of Cuba, west of Hispaniola (the is ...

Montserrat Montserrat ( , ) is a British Overseas Territories, British Overseas Territory in the Caribbean. It is part of the Leeward Islands, the northern portion of the Lesser Antilles chain of the West Indies. Montserrat is about long and wide, wit ...

Saint Kitts and Nevis Saint Kitts and Nevis, officially the Federation of Saint Christopher (St Kitts) and Nevis, is an island country consisting of the two islands of Saint Kitts and Nevis, both located in the West Indies, in the Leeward Islands chain of the Less ...

St. Lucia Saint Lucia is an island country of the West Indies in the eastern Caribbean. Part of the Windward Islands of the Lesser Antilles, it is located north/northeast of the island of Saint Vincent (Saint Vincent and the Grenadines), Saint Vincent ...

, St. Vincent and the Grenadines,

Trinidad and Tobago Trinidad and Tobago, officially the Republic of Trinidad and Tobago, is the southernmost island country in the Caribbean, comprising the main islands of Trinidad and Tobago, along with several List of islands of Trinidad and Tobago, smaller i ...

, and the

British Virgin Islands The British Virgin Islands (BVI), officially the Virgin Islands, are a British Overseas Territories, British Overseas Territory in the Caribbean, to the east of Puerto Rico and the United States Virgin Islands, US Virgin Islands and north-west ...

* 977 = prime number, sum of nine consecutive primes (89 + 97 + 101 + 103 + 107 + 109 + 113 + 127 + 131), balanced prime, Chen prime, Eisenstein prime with no imaginary part, Stern prime, strictly non-palindromic number ** country calling code for Nepal ** EAN prefix for

ISSN An International Standard Serial Number (ISSN) is an eight-digit to uniquely identify a periodical publication (periodical), such as a magazine. The ISSN is especially helpful in distinguishing between serials with the same title. ISSNs a ...

s ** ISBN Group Identifier for books published in

Egypt Egypt ( , ), officially the Arab Republic of Egypt, is a country spanning the Northeast Africa, northeast corner of Africa and Western Asia, southwest corner of Asia via the Sinai Peninsula. It is bordered by the Mediterranean Sea to northe ...

* 978 = 2 × 3 × 163, sphenic number, nontotient, number of secondary structures of RNA molecules with 11 nucleotides ** First EAN prefix for ISBNs ** ISBN Group Identifier for books published in

Nigeria Nigeria, officially the Federal Republic of Nigeria, is a country in West Africa. It is situated between the Sahel to the north and the Gulf of Guinea in the Atlantic Ocean to the south. It covers an area of . With Demographics of Nigeria, ...

* 979 = 11 × 89, the sum of the five smallest fourth powers:

979=\sum_^n^4

** Second EAN prefix for ISBNs. Also for ISMNs ** ISBN Group Identifier for books published in

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania, between the Indian Ocean, Indian and Pacific Ocean, Pacific oceans. Comprising over List of islands of Indonesia, 17,000 islands, including Sumatra, ...

980s

* 980 = 2² × 5 × 7², number of ways to tile a hexagon of edge 3 wit
calissons
of side 1. ** ISBN Group Identifier for books published in

Venezuela Venezuela, officially the Bolivarian Republic of Venezuela, is a country on the northern coast of South America, consisting of a continental landmass and many Federal Dependencies of Venezuela, islands and islets in the Caribbean Sea. It com ...

* 981 = 3² × 109 ** one of two ISBN Group Identifiers for books published in

Singapore Singapore, officially the Republic of Singapore, is an island country and city-state in Southeast Asia. The country's territory comprises one main island, 63 satellite islands and islets, and one outlying islet. It is about one degree ...

* 982 = 2 × 491,

** ISBN Group Identifier for books published in the

Cook Islands The Cook Islands is an island country in Polynesia, part of Oceania in the South Pacific Ocean. It consists of 15 islands whose total land area is approximately . The Cook Islands' Exclusive Economic Zone (EEZ) covers of ocean. Avarua is its ...

Fiji Fiji, officially the Republic of Fiji, is an island country in Melanesia, part of Oceania in the South Pacific Ocean. It lies about north-northeast of New Zealand. Fiji consists of an archipelago of more than 330 islands—of which about ...

Kiribati Kiribati, officially the Republic of Kiribati, is an island country in the Micronesia subregion of Oceania in the central Pacific Ocean. Its permanent population is over 119,000 as of the 2020 census, and more than half live on Tarawa. The st ...

Marshall Islands The Marshall Islands, officially the Republic of the Marshall Islands, is an island country west of the International Date Line and north of the equator in the Micronesia region of the Northwestern Pacific Ocean. The territory consists of 29 c ...

Micronesia Micronesia (, ) is a subregion of Oceania, consisting of approximately 2,000 small islands in the Northwestern Pacific Ocean. It has a close shared cultural history with three other island regions: Maritime Southeast Asia to the west, Poly ...

Nauru Nauru, officially the Republic of Nauru, formerly known as Pleasant Island, is an island country and microstate in the South Pacific Ocean. It lies within the Micronesia subregion of Oceania, with its nearest neighbour being Banaba (part of ...

New Caledonia New Caledonia ( ; ) is a group of islands in the southwest Pacific Ocean, southwest of Vanuatu and east of Australia. Located from Metropolitan France, it forms a Overseas France#Sui generis collectivity, ''sui generis'' collectivity of t ...

Niue Niue is a self-governing island country in free association with New Zealand. It is situated in the South Pacific Ocean and is part of Polynesia, and predominantly inhabited by Polynesians. One of the world's largest coral islands, Niue is c ...

Palau Palau, officially the Republic of Palau, is an island country in the Micronesia subregion of Oceania in the western Pacific Ocean. The Republic of Palau consists of approximately 340 islands and is the western part of the Caroline Islands ...

Solomon Islands Solomon Islands, also known simply as the Solomons,John Prados, ''Islands of Destiny'', Dutton Caliber, 2012, p,20 and passim is an island country consisting of six major islands and over 1000 smaller islands in Melanesia, part of Oceania, t ...

Tokelau Tokelau (; ; known previously as the Union Islands, and, until 1976, known officially as the Tokelau Islands) is a dependent territory of New Zealand in the southern Pacific Ocean. It consists of three tropical coral atolls: Atafu, Nukunonu, an ...

Tonga Tonga, officially the Kingdom of Tonga, is an island country in Polynesia, part of Oceania. The country has 171 islands, of which 45 are inhabited. Its total surface area is about , scattered over in the southern Pacific Ocean. accordin ...

Tuvalu Tuvalu ( ) is an island country in the Polynesian subregion of Oceania in the Pacific Ocean, about midway between Hawaii and Australia. It lies east-northeast of the Santa Cruz Islands (which belong to the Solomon Islands), northeast of Van ...

Vanuatu Vanuatu ( or ; ), officially the Republic of Vanuatu (; ), is an island country in Melanesia located in the South Pacific Ocean. The archipelago, which is of volcanic origin, is east of northern Australia, northeast of New Caledonia, east o ...

Western Samoa Samoa, officially the Independent State of Samoa and known until 1997 as Western Samoa, is an island country in Polynesia, part of Oceania, in the South Pacific Ocean. It consists of two main islands ( Savai'i and Upolu), two smaller, inhabit ...

* 983 = prime number,

safe prime In number theory, a prime number ''p'' is a if 2''p'' + 1 is also prime. The number 2''p'' + 1 associated with a Sophie Germain prime is called a . For example, 11 is a Sophie Germain prime and 2 × 11 +&nbs ...

, Chen prime, Eisenstein prime with no imaginary part, Wedderburn–Etherington number, strictly non-palindromic number ** One of two ISBN Group Identifiers for books published in

Malaysia Malaysia is a country in Southeast Asia. Featuring the Tanjung Piai, southernmost point of continental Eurasia, it is a federation, federal constitutional monarchy consisting of States and federal territories of Malaysia, 13 states and thre ...

* 984 = 2³ × 3 × 41 ** ISBN Group Identifier for books published in

Bangladesh Bangladesh, officially the People's Republic of Bangladesh, is a country in South Asia. It is the List of countries and dependencies by population, eighth-most populous country in the world and among the List of countries and dependencies by ...

* 985 = 5 × 197, sum of three consecutive primes (317 + 331 + 337),

Markov number A Markov number or Markoff number is a positive integer ''x'', ''y'' or ''z'' that is part of a solution to the Markov Diophantine equation :x^2 + y^2 + z^2 = 3xyz,\, studied by . The first few Markov numbers are :1 (number), 1, 2 (number), ...

Pell number In mathematics, the Pell numbers are an infinite sequence of integers, known since ancient times, that comprise the denominators of the closest rational approximations to the square root of 2. This sequence of approximations begins , , , , an ...

, Smith number ** one of two ISBN Group Identifiers for books published in

Belarus Belarus, officially the Republic of Belarus, is a landlocked country in Eastern Europe. It is bordered by Russia to the east and northeast, Ukraine to the south, Poland to the west, and Lithuania and Latvia to the northwest. Belarus spans an a ...

* 986 = 2 × 17 × 29, sphenic number, nontotient, strobogrammatic, number of unimodal compositions of 14 where the maximal part appears once ** one of two ISBN Group Identifiers for books published in Taiwan and China * 987 = 3 × 7 × 47,

Fibonacci number In mathematics, the Fibonacci sequence is a Integer sequence, sequence in which each element is the sum of the two elements that precede it. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted . Many w ...

, number of partitions of 52 into prime parts ** one of two ISBN Group Identifiers for books published in Argentina * 988 = 2² × 13 × 19, nontotient. sum of four consecutive primes (239 + 241 + 251 + 257). A cake number. ** one of two ISBN Group Identifiers for books published in Hong Kong. ** the

suicide prevention hotline ''Suicide Prevention Hotline EP'' is an official extended play release from Alaska in Winter. It debuted 31 May 2011 through the band's Blogspot account, and a note published on its Facebook Facebook is a social media and social ne ...

in the United States * 989 = 23 × 43, Extra strong Lucas pseudoprime ** one of two ISBN Group Identifiers for books published in Portugal

990s

*990 = 2 × 3² × 5 × 11, sum of six consecutive primes (151 + 157 + 163 + 167 + 173 + 179), 44th

, Harshad number **best possible

VantageScore VantageScore is a consumer Credit score in the United States, credit-scoring system in the United States, created through a joint venture of the three major credit bureaus (Equifax, Experian, and TransUnion). The model is managed and maintained by ...

credit score *991 = prime number, sum of five consecutive primes (191 + 193 + 197 + 199 + 211), sum of seven consecutive primes (127 + 131 + 137 + 139 + 149 + 151 + 157), Chen prime, lucky prime, prime index prime *992 = 2⁵ × 31,

, nontotient; number of eleven-dimensional

exotic sphere In an area of mathematics called differential topology, an exotic sphere is a differentiable manifold ''M'' that is homeomorphic but not diffeomorphic to the standard Euclidean ''n''-sphere. That is, ''M'' is a sphere from the point of view of ...

s. **country calling code for Tajikistan *993 = 3 × 331 **country calling code for Turkmenistan *994 = 2 × 7 × 71, sphenic number, nontotient, number of binary words of length 13 with all distinct runs. **country calling code for Azerbaijan *995 = 5 × 199 **country calling code for Georgia **Singapore fire brigade and emergency ambulance services hotline, Brunei Darussalam fire service emergency number *996 = 2² × 3 × 83 **country calling code for Kyrgyzstan *997 = largest three-digit prime number, strictly non-palindromic number. It is also a lucky prime. *998 = 2 × 499, nontotient, number of 7-node graphs with two connected components. **country calling code for Uzbekistan *999 = 3³ × 37,

Kaprekar number In mathematics, a natural number in a given number base is a p-Kaprekar number if the representation of its square in that base can be split into two parts, where the second part has p digits, that add up to the original number. For example, in ...

, Harshad number **In some parts of the world, such as the UK and

Commonwealth A commonwealth is a traditional English term for a political community founded for the common good. The noun "commonwealth", meaning "public welfare, general good or advantage", dates from the 15th century. Originally a phrase (the common-wealth ...

countries, 999 (pronounced as nine, nine, nine) is the

for all emergency services **

999 999 or triple nine most often refers to: * 999 (emergency telephone number), a telephone number for the emergency services in several countries * 999 (number), an integer * AD 999, a year * 999 BC, a year Media Books * 999 (anthology), ''99 ...

was a London

punk Punk or punks may refer to: Genres, subculture, and related aspects * Punk rock, a music genre originating in the 1970s associated with various subgenres * Punk subculture, a subculture associated with punk rock, or aspects of the subculture s ...

band active during the 1970s. **A number commonly associated with

Juice WRLD Jarad Anthony Higgins (December 2, 1998 – December 8, 2019), known professionally as Juice Wrld (pronounced "juice world"; stylized as Juice WRLD), was an American rapper, singer, and songwriter. He emerged as a leading figure in the emo rap ...

References

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