93 (ninety-three) is the natural number following
92 and preceding
94.
In mathematics
93 is:
* the twenty-eighth distinct
semiprime
In mathematics, a semiprime is a natural number that is the product of exactly two prime numbers. The two primes in the product may equal each other, so the semiprimes include the squares of prime numbers.
Because there are infinitely many prime ...
and the ninth of the form (3.q).
* the first number in the third triplet of consecutive semiprimes, 93, 94, and 95.
* a
Blum integer In mathematics, a natural number ''n'' is a Blum integer if is a semiprime for which ''p'' and ''q'' are distinct prime numbers congruent to 3 mod 4.Joe Hurd, Blum Integers (1997), retrieved 17 Jan, 2011 from http://www.gilith.com/research/tal ...
, since its two prime factors, 3 and 31 are both
Gaussian primes.
* a
repdigit in base 5 (333
5), and 30 (33
30).
* palindromic in bases 2, 5, and 30.
* a
lucky number
In number theory, a lucky number is a natural number in a set which is generated by a certain "sieve". This sieve is similar to the Sieve of Eratosthenes that generates the primes, but it eliminates numbers based on their position in the rema ...
.
* a
cake number.
* an
idoneal number.
There are 93 different
cyclic
Cycle, cycles, or cyclic may refer to:
Anthropology and social sciences
* Cyclic history, a theory of history
* Cyclical theory, a theory of American political history associated with Arthur Schlesinger, Sr.
* Social cycle, various cycles in so ...
Gilbreath permutation A Gilbreath shuffle is a way to shuffle a deck of cards, named after mathematician Norman Gilbreath (also known for Gilbreath's conjecture).
Gilbreath's principle describes the properties of a deck that are preserved by this type of shuffle, and ...
s on 11 elements, and therefore there are 93 different
real
Real may refer to:
Currencies
* Brazilian real (R$)
* Central American Republic real
* Mexican real
* Portuguese real
* Spanish real
* Spanish colonial real
Music Albums
* ''Real'' (L'Arc-en-Ciel album) (2000)
* ''Real'' (Bright album) (2010) ...
periodic points of order 11 on the
Mandelbrot set
The Mandelbrot set () is the set of complex numbers c for which the function f_c(z)=z^2+c does not diverge to infinity when iterated from z=0, i.e., for which the sequence f_c(0), f_c(f_c(0)), etc., remains bounded in absolute value.
This ...
.
In other fields
Ninety-three 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
neptunium
Neptunium is a chemical element with the symbol Np and atomic number 93. A radioactive actinide metal, neptunium is the first transuranic element. Its position in the periodic table just after uranium, named after the planet Uranus, led to it bein ...
, an actinide.
* The code for
international direct dial phone calls to
Afghanistan
Afghanistan, officially the Islamic Emirate of Afghanistan,; prs, امارت اسلامی افغانستان is a landlocked country located at the crossroads of Central Asia and South Asia. Referred to as the Heart of Asia, it is borde ...
.
* One of two
ISBN
The International Standard Book Number (ISBN) is a numeric commercial book identifier that is intended to be unique. Publishers purchase ISBNs from an affiliate of the International ISBN Agency.
An ISBN is assigned to each separate edition a ...
Group Identifiers for books published in
India
India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area, the List of countries and dependencies by population, second-most populous ...
.
* The number of the French department
Seine-Saint-Denis
() is a department of France located in the Grand Paris metropolis in the region. In French, it is often referred to colloquially as ' or ' ("ninety-three" or "nine three"), after its official administrative number, 93. Its prefecture is Bobig ...
, and as such used by many French
gangsta rap
Gangsta rap or gangster rap, initially called reality rap, emerged in the mid- to late 1980s as a controversial hip-hop subgenre whose lyrics assert the culture and values typical of American street gangs and street hustlers. Many gangsta rappe ...
pers and those emulating their speech.
In classical Persian
finger counting, the number 93 is represented by a closed fist. Because of this, classical Arab and Persian poets around 1 CE referred to someone's lack of generosity by saying that the person's hand made "ninety-three".
See also
*
AD 93, a year in the
Julian calendar
The Julian calendar, proposed by Roman consul Julius Caesar in 46 BC, was a reform of the Roman calendar. It took effect on , by edict. It was designed with the aid of Greek mathematicians and astronomers such as Sosigenes of Alexandri ...
*
List of highways numbered 93
*''
Ninety-Three'' (''Quatrevingt-treize''), a novel concerning the
French Revolution
The French Revolution ( ) was a period of radical political and societal change in France that began with the Estates General of 1789 and ended with the formation of the French Consulate in November 1799. Many of its ideas are conside ...
by
Victor Hugo
Victor-Marie Hugo (; 26 February 1802 – 22 May 1885) was a French Romantic writer and politician. During a literary career that spanned more than sixty years, he wrote in a variety of genres and forms. He is considered to be one of the great ...
*
93 (Thelema), a greeting among
Thelemites based on the
numerological
Numerology (also known as arithmancy) is the belief in an occult, divine or mystical relationship between a number and one or more coinciding events. It is also the study of the numerical value, via an alphanumeric system, of the letters in w ...
(
gematric) value of Thelema (Will) and Agape (Love) in
Greek letters
The Greek alphabet has been used to write the Greek language since the late 9th or early 8th century BCE. It is derived from the earlier Phoenician alphabet, and was the earliest known alphabetic script to have distinct letters for vowels as we ...
.
* ''
Babia 93'', an album from a Pakistani pop singer
Sajjad Ali
*
London
London is the capital and List of urban areas in the United Kingdom, largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary dow ...
's 93 Feet East music venue
*
Current 93
Current 93 are an English experimental music group, working since the early 1980s in folk-based musical forms. The band was founded in 1982 by David Tibet, who has been Current 93's only constant member.
Background
Tibet has been the only const ...
, a musical project of
David Tibet
David Tibet (born David Michael Bunting; 5 March 1960) is a British poet and artist who founded the music group Current 93, of which he is the only full-time member.
He was given the name "Tibet" by Genesis P-Orridge, and in January 2005 he ...
*
Los Angeles
Los Angeles ( ; es, Los Ángeles, link=no , ), often referred to by its initials L.A., is the largest city in the state of California and the second most populous city in the United States after New York City, as well as one of the world ...
93 KHJ radio
*
United Airlines Flight 93
United Airlines Flight 93 was a domestic scheduled passenger flight that was hijacked by four al-Qaeda attackers aboard the plane on the morning of September 11, 2001, as part of the September 11 attacks. The plane eventually crashed in S ...
, one of the airplanes hijacked on September 11, 2001.
* ''
93 'til Infinity
''93 'til Infinity'' is the debut studio album by American hip-hop group Souls of Mischief. It was released on February 13, 1993 on the Jive label.
Composition
The sound of ''93 'til Infinity'' is characteristic of the distinct style explored b ...
'', the debut album by
Oakland
Oakland is the largest city and the county seat of Alameda County, California, United States. A major West Coast port, Oakland is the largest city in the East Bay region of the San Francisco Bay Area, the third largest city overall in the Bay ...
hip hop group
Souls of Mischief
Souls of Mischief is a hip hop group from Oakland, California, that is also part of the hip hop collective Hieroglyphics. The Souls of Mischief formed in 1991 and is composed of rappers A-Plus, Opio, Phesto, and Tajai.
History
East Oakland n ...
.
References
External links
On the Number 93
{{DEFAULTSORT:93 (Number)
Integers