natural number
In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country").
Numbers used for counting are called '' cardinal ...
sphenic number
In number theory, a sphenic number (from grc, σφήνα, '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.
Definit ...
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 ...
.
* the seventh
pentagonal number
A pentagonal number is a figurate number that extends the concept of triangular and square numbers to the pentagon, but, unlike the first two, the patterns involved in the construction of pentagonal numbers are not rotationally symmetrical. The ...
.
* the fourth tridecagonal number.
* the fifth pentatope number.
* the number of ways to choose 4 objects out of 8 if order does not matter. This makes it a
central binomial coefficient
In mathematics the ''n''th central binomial coefficient is the particular binomial coefficient
: = \frac = \prod\limits_^\frac \textn \geq 0.
They are called central since they show up exactly in the middle of the even-numbered rows in Pascal ...
.
* the smallest weird number, a natural number that is abundant but not
semiperfect
In number theory, a semiperfect number or pseudoperfect number is a natural number ''n'' that is equal to the sum of all or some of its proper divisors. A semiperfect number that is equal to the sum of all its proper divisors is a perfect number.
...
.
* a
palindromic number
A palindromic number (also known as a numeral palindrome or a numeric palindrome) is a number (such as 16461) that remains the same when its digits are reversed. In other words, it has reflectional symmetry across a vertical axis. The term ''palin ...
in bases 9 (779), 13 (5513) and 34 (2234).
* a
Harshad number
In mathematics, a harshad number (or Niven number) in a given number base is an integer that is divisible by the sum of its digits when written in that base.
Harshad numbers in base are also known as -harshad (or -Niven) numbers.
Harshad number ...
in bases 6, 8, 9, 10, 11, 13, 14, 15 and 16.
* an
Erdős–Woods number In number theory, a positive integer is said to be an Erdős–Woods number if it has the following property:
there exists a positive integer such that in the sequence of consecutive integers, each of the elements has a non-trivial common factor ...
, since it is possible to find sequences of 70 consecutive integers such that each inner member shares a factor with either the first or the last member.
The sum of the first 24 squares starting from 1 is 70 = 4900, i.e. a square pyramidal number. This is the only non trivial solution to the
cannonball problem
In the mathematics of figurate numbers, the cannonball problem asks which numbers are both square and square pyramidal. The problem can be stated as: given a square arrangement of cannonballs, for what size squares can these cannonballs also be a ...
and relates 70 to the
Leech lattice
In mathematics, the Leech lattice is an even unimodular lattice Λ24 in 24-dimensional Euclidean space, which is one of the best models for the kissing number problem. It was discovered by . It may also have been discovered (but not published) by ...
and thus
string theory
In physics, string theory is a theoretical framework in which the point-like particles of particle physics are replaced by one-dimensional objects called strings. String theory describes how these strings propagate through space and intera ...
.
In science
*70 is the
atomic number
The atomic number or nuclear charge number (symbol ''Z'') of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei, this is equal to the proton number (''n''p) or the number of protons found in the nucleus of ever ...
of
ytterbium
Ytterbium is a chemical element with the symbol Yb and atomic number 70. It is a metal, the fourteenth and penultimate element in the lanthanide series, which is the basis of the relative stability of its +2 oxidation state. However, like the othe ...
, a lanthanide
Astronomy
*
Messier object
The Messier objects are a set of 110 astronomical objects catalogued by the French astronomer Charles Messier in his ''Catalogue des Nébuleuses et des Amas d'Étoiles'' (''Catalogue of Nebulae and Star Clusters'').
Because Messier was only in ...
magnitude
Magnitude may refer to:
Mathematics
*Euclidean vector, a quantity defined by both its magnitude and its direction
*Magnitude (mathematics), the relative size of an object
*Norm (mathematics), a term for the size or length of a vector
*Order of ...
9.0
globular cluster
A globular cluster is a spheroidal conglomeration of stars. Globular clusters are bound together by gravity, with a higher concentration of stars towards their centers. They can contain anywhere from tens of thousands to many millions of membe ...
in the
constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The origins of the earliest constellation ...
New General Catalogue
The ''New General Catalogue of Nebulae and Clusters of Stars'' (abbreviated NGC) is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, including galaxies, star clusters and ...
spiral galaxy
Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work ''The Realm of the Nebulae''Andromeda
In religion
* In
Jewish
Jews ( he, יְהוּדִים, , ) or Jewish people are an ethnoreligious group and nation originating from the Israelites Israelite origins and kingdom: "The first act in the long drama of Jewish history is the age of the Israelites""The ...
tradition:
** Seventy souls went down to Egypt to begin the Hebrews' Egyptian exile ().
** There is a core of 70 nations and 70 world languages, paralleling the 70 names in the
Table of Nations
The Generations of Noah, also called the Table of Nations or Origines Gentium, is a genealogy of the sons of Noah, according to the Hebrew Bible (Genesis ), and their dispersion into many lands after the Flood, focusing on the major known soci ...
.
** There were 70 men in the Great
Sanhedrin
The Sanhedrin ( Hebrew and Aramaic: סַנְהֶדְרִין; Greek: , '' synedrion'', 'sitting together,' hence ' assembly' or 'council') was an assembly of either 23 or 71 elders (known as " rabbis" after the destruction of the Second Temp ...
, the Supreme Court of ancient Israel. (Sanhedri 1:4 )
** According to the Jewish
Aggada
Aggadah ( he, ''ʾAggāḏā'' or ''Haggāḏā''; Jewish Babylonian Aramaic: אַגָּדְתָא ''ʾAggāḏəṯāʾ''; "tales, fairytale, lore") is the non-legalistic exegesis which appears in the classical rabbinic literature of Judaism, ...
, there are 70 perspectives ("faces") to the
Torah
The Torah (; hbo, ''Tōrā'', "Instruction", "Teaching" or "Law") is the compilation of the first five books of the Hebrew Bible, namely the books of Genesis, Exodus, Leviticus, Numbers and Deuteronomy. In that sense, Torah means the ...
(Numbers Rabba 13:15 .
** Seventy elders were assembled by
Moses
Moses hbo, מֹשֶׁה, Mōše; also known as Moshe or Moshe Rabbeinu ( Mishnaic Hebrew: מֹשֶׁה רַבֵּינוּ, ); syr, ܡܘܫܐ, Mūše; ar, موسى, Mūsā; grc, Mωϋσῆς, Mōÿsēs () is considered the most important pr ...
on
God
In monotheistic thought, God is usually viewed as the supreme being, creator, and principal object of faith. Swinburne, R.G. "God" in Honderich, Ted. (ed)''The Oxford Companion to Philosophy'', Oxford University Press, 1995. God is typically ...
's command in the desert ().
** allots three score and ten (70 years) for a man's life, and the
Mishnah
The Mishnah or the Mishna (; he, מִשְׁנָה, "study by repetition", from the verb ''shanah'' , or "to study and review", also "secondary") is the first major written collection of the Jewish oral traditions which is known as the Oral Tor ...
attributes that age to "strength" (Avo 5:32 , as one who survives that age is described by the verse as "the strong".
**
Ptolemy II Philadelphus
; egy, Userkanaenre Meryamun Clayton (2006) p. 208
, predecessor = Ptolemy I
, successor = Ptolemy III
, horus = ''ḥwnw-ḳni'Khunuqeni''The brave youth
, nebty = ''wr-pḥtj'Urpekhti''Great of strength
, gold ...
ordered 72 Jewish elders to translate the
Torah
The Torah (; hbo, ''Tōrā'', "Instruction", "Teaching" or "Law") is the compilation of the first five books of the Hebrew Bible, namely the books of Genesis, Exodus, Leviticus, Numbers and Deuteronomy. In that sense, Torah means the ...
into
Greek
Greek may refer to:
Greece
Anything of, from, or related to Greece, a country in Southern Europe:
*Greeks, an ethnic group.
*Greek language, a branch of the Indo-European language family.
**Proto-Greek language, the assumed last common ancestor ...
; the result was the
Septuagint
The Greek Old Testament, or Septuagint (, ; from the la, septuaginta, lit=seventy; often abbreviated ''70''; in Roman numerals, LXX), is the earliest extant Greek translation of books from the Hebrew Bible. It includes several books beyond t ...
(from the
Latin
Latin (, or , ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through ...
for "seventy"). The Roman numeral seventy, LXX, is the scholarly symbol for the Septuagint.
* In
Christianity
Christianity is an Abrahamic monotheistic religion based on the life and teachings of Jesus of Nazareth. It is the world's largest and most widespread religion with roughly 2.38 billion followers representing one-third of the global popula ...
:
**In ,
Jesus
Jesus, likely from he, יֵשׁוּעַ, translit=Yēšūaʿ, label= Hebrew/ Aramaic ( AD 30 or 33), also referred to as Jesus Christ or Jesus of Nazareth (among other names and titles), was a first-century Jewish preacher and relig ...
tells
Peter
Peter may refer to:
People
* List of people named Peter, a list of people and fictional characters with the given name
* Peter (given name)
** Saint Peter (died 60s), apostle of Jesus, leader of the early Christian Church
* Peter (surname), a sur ...
to forgive people seventy times seven times.
**In , Jesus appoints
Seventy Disciples
The seventy disciples or seventy-two disciples, known in the Eastern Christian traditions as the seventy apostles or seventy-two apostles, were early emissaries of Jesus mentioned in the Gospel of Luke. The correct Greek terminology is evdomik ...
and sends them out in pairs to preach the Gospel.
*
Seventy
70 (seventy) is the natural number following 69 and preceding 71.
In mathematics
70 is:
* a sphenic number because it factors as 3 distinct primes.
* a Pell number.
* the seventh pentagonal number.
* the fourth tridecagonal number.
* the fift ...
is a priesthood office in the Latter Day Saint religion.
* In Islamic history and in Islamic interpretation the number 70 or 72 is most often and generally hyperbole for an infinite amount:
** There are 70 dead among the Prophet
Muhammad
Muhammad ( ar, مُحَمَّد; 570 – 8 June 632 CE) was an Arab religious, social, and political leader and the founder of Islam. According to Islamic doctrine, he was a prophet divinely inspired to preach and confirm the mon ...
's adversaries during the
Battle of Badr
The Battle of Badr ( ar, غَزْوَةُ بَدِرْ ), also referred to as The Day of the Criterion (, ) in the Qur'an and by Muslims, was fought on 13 March 624 CE (17 Ramadan, 2 AH), near the present-day city of Badr, Al Madinah Provin ...
.
** 70 of the Prophet Muhammad's followers are martyred at the
Battle of Uhud
The Battle of Uhud ( ar, غَزْوَة أُحُد, ) was fought on Saturday, 23 March 625 AD (7 Shawwal, 3 AH), in the valley north of Mount Uhud.Watt (1974) p. 136. The Qurayshi Meccans, led by Abu Sufyan ibn Harb, commanded an army of 3,000 ...
.
** In
Shia Islam
Shīʿa Islam or Shīʿīsm is the second-largest branch of Islam. It holds that the Islamic prophet Muhammad designated ʿAlī ibn Abī Ṭālib as his successor (''khalīfa'') and the Imam (spiritual and political leader) after him, mos ...
, there are 70 martyrs among
Imam Hussein
Abū ʿAbd Allāh al-Ḥusayn ibn ʿAlī ibn Abī Ṭālib ( ar, أبو عبد الله الحسين بن علي بن أبي طالب; 10 January 626 – 10 October 680) was a grandson of the Islamic prophet Muhammad and a son of Ali ibn Abi ...
archery
Archery is the sport, practice, or skill of using a bow to shoot arrows.Paterson ''Encyclopaedia of Archery'' p. 17 The word comes from the Latin ''arcus'', meaning bow. Historically, archery has been used for hunting and combat. In ...
, the targets are 70 meters from the archers.
*In
college football
College football (french: Football universitaire) refers to gridiron football played by teams of student athletes. It was through college football play that American football in the United States, American football rules first gained populari ...
, two teams scored 70 points in bowl games, the most in such contests: first the
West Virginia Mountaineers
The West Virginia Mountaineers are the athletic teams that represent West Virginia University, an American university located in Morgantown, West Virginia. The school is a member of National Collegiate Athletic Association Division I. The Mou ...
against the
Clemson Tigers
The Clemson Tigers are the athletic teams that represent Clemson University, located in Clemson, South Carolina. They compete as a member of the National Collegiate Athletic Association (NCAA) Division I level (Football Bowl Subdivision (FBS) ...
in the
2012 Orange Bowl
The 2012 Discover Orange Bowl was a postseason college football bowl game on Wednesday, January 4, 2012, at Sun Life Stadium, now known as Hard Rock Stadium, in Miami Gardens, Florida. The West Virginia Mountaineers defeated the Clemson Tigers by ...
, and the
Army Black Knights
The Army Black Knights are the athletic teams that represent the United States Military Academy, located in West Point, New York. In sports contexts, since 2015, the teams are commonly referred to as Army. The Black Knights compete at the Nation ...
against the
Houston Cougars
The Houston Cougars are the athletic teams representing the University of Houston. Informally, the Houston Cougars have also been referred to as the Coogs, UH, or simply Houston. Houston's nickname was suggested by early physical education instr ...
in the
2018 Armed Forces Bowl
The 2018 Armed Forces Bowl was a college football bowl game played on December 22, 2018. It was the 16th edition of the Armed Forces Bowl, and one of the 2018–19 bowl games concluding the 2018 FBS football season. Sponsored by aerospace and ...
Hungarian Grand Prix
The Hungarian Grand Prix ( hu, Magyar Nagydíj) is a motor racing event held annually in Mogyoród. Since 1986, the race has been a round of the FIA Formula One World Championship.
History Origins
The first Hungarian Grand Prix was held on 2 ...
.
In other fields
* 70
miles per hour
Miles per hour (mph, m.p.h., MPH, or mi/h) is a British imperial and United States customary unit of speed expressing the number of miles travelled in one hour. It is used in the United Kingdom, the United States, and a number of smaller cou ...
is a common
speed limit
Speed limits on road traffic, as used in most countries, set the legal maximum speed at which vehicles may travel on a given stretch of road. Speed limits are generally indicated on a traffic sign reflecting the maximum permitted speed - expre ...
for freeways in many
American
American(s) may refer to:
* American, something of, from, or related to the United States of America, commonly known as the "United States" or "America"
** Americans, citizens and nationals of the United States of America
** American ancestry, pe ...
states, primarily in the central United States (in the Eastern U.S. the speed limit is generally 65, in the Western U.S. it is 75).
* 70 miles per hour is the national speed limit in the
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and ...
for cars and motorcycles on the best grades of road.
* 70 years of marriage is marked by a
platinum
Platinum is a chemical element with the symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Its name originates from Spanish , a diminutive of "silver".
Pla ...
wedding anniversary
A wedding anniversary is the anniversary of the date a wedding took place. Couples may take the occasion to celebrate their relationship, either privately or with a larger party. Special celebrations and gifts are often given for particular a ...
.
* 70 is the
hull number
Hull number is a serial identification number given to a boat or ship. For the military, a lower number implies an older vessel. For civilian use, the HIN is used to trace the boat's history. The precise usage varies by country and type.
United ...
Carl Vinson
Carl Vinson (November 18, 1883 – June 1, 1981) was an American politician who served in the U.S. House of Representatives for over 50 years and was influential in the 20th century expansion of the U.S. Navy. He was a member of the Democratic ...
.
* The French department
Haute-Saône
Haute-Saône (; Arpitan: ''Hiôta-Sona''; English: Upper Saône) is a department in the Bourgogne-Franche-Comté region of northeastern France. Named after the river Saône, it had a population of 235,313 in 2019.70 BC
__NOTOC__
Year 70 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Pompeius and Crassus (or, less frequently, year 684 ''Ab urbe condita''). The denomination 70 BC for this year has been ...
,
AD 70
AD 70 ( LXX) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Vespasian and Titus (or, less frequently, year 823 ''Ab urbe condita''). Th ...
, or
1970
Events
January
* January 1 – Unix time epoch reached at 00:00:00 UTC.
* January 5 – The 7.1 Tonghai earthquake shakes Tonghai County, Yunnan province, China, with a maximum Mercalli intensity of X (''Extreme''). Between 10,000 and ...
.
* The number 70 is frequently referenced by the musical duo
Boards of Canada
Boards of Canada are a Scottish electronic music duo consisting of brothers Michael Sandison and Marcus Eoin, formed initially as a group in 1986 before becoming a duo in the 1990s.Hoffmann, Heiko.Pitchfork: Interviews: Boards of Canada (Septemb ...
: they have songs titled "Sixtyten" (''
Music Has the Right to Children
''Music Has the Right to Children'' is the debut studio album by Scottish electronic music duo Boards of Canada. It was released on 20 April 1998 in the UK by Warp and Skam Records and in the US by Matador. The album was produced at Hexagon Sun, ...
'', 1998) and "The Smallest Weird Number" (''
Geogaddi
''Geogaddi'' is the second studio album by Scottish electronic music duo Boards of Canada. It was released on 13 February 2002 in Japan, then five days later in Europe, by Warp. The album is aesthetically and stylistically darker than the approa ...
'', 2002), and their record label is named Music70.
*Under
Social Security (United States)
In the United States, Social Security is the commonly used term for the federal Old-Age, Survivors, and Disability Insurance (OASDI) program and is administered by the Social Security Administration (SSA). The original Social Security Act ...
, the age at which a person can receive the maximum retirement benefits (and may do so and continue working without reduction of benefits)
Number name
Several languages, especially ones with
vigesimal
vigesimal () or base-20 (base-score) numeral system is based on twenty (in the same way in which the decimal numeral system is based on ten). '' Vigesimal'' is derived from the Latin adjective '' vicesimus'', meaning 'twentieth'.
Places
In a ...
number systems, do not have a specific word for 70: for example, ; , short for . (For French, this is true only in France; other French-speaking regions such as
Belgium
Belgium, ; french: Belgique ; german: Belgien officially the Kingdom of Belgium, is a country in Northwestern Europe. The country is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeast, France to ...
,
Switzerland
). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...
,
Aosta Valley
, Valdostan or Valdotainian it, Valdostano (man) it, Valdostana (woman)french: Valdôtain (man)french: Valdôtaine (woman)
, population_note =
, population_blank1_title = Official languages
, population_blank1 = Italian French
...
and
Jersey
Jersey ( , ; nrf, Jèrri, label= Jèrriais ), officially the Bailiwick of Jersey (french: Bailliage de Jersey, links=no; Jèrriais: ), is an island country and self-governing Crown Dependency near the coast of north-west France. It is the ...
use .Peter Higgins, ''Number Story''. London: Copernicus Books (2008): 19. "Belgian French speakers however grew tired of this and introduced the new names septante, octante, nonante etc. for these numbers".)