Английская Википедия:93 (number)
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Шаблон:Infobox number 93 (ninety-three) is the natural number following 92 and preceding 94.
In mathematics
93 is:
- the 28th distinct semiprime[1] and the 9th of the form (3.q) where q is a higher prime.[2]
- the first number in the 3rd triplet of consecutive semiprimes, 93, 94, 95.[3]
- with an aliquot sum of 35; itself a semiprime, within an aliquot sequence (93,35,13,1,0) of three numbers to the Prime 13 in the 13-Aliquot tree.
- a Blum integer, since its two prime factors, 3 and 31 are both Gaussian primes.[4]
- a repdigit in base 5 (3335),[5] and 30 (3330).
- palindromic in bases 2, 5, and 30.
- a lucky number.[6]
- a cake number.[7]
- an idoneal number.[8]
There are 93 different cyclic Gilbreath permutations on 11 elements,[9] and therefore there are 93 different real periodic points of order 11 on the Mandelbrot set.[10]
In other fields
Ninety-three is:
- The atomic number of neptunium, an actinide.
- The code for international direct dial phone calls to Afghanistan.
- One of two ISBN Group Identifiers for books published in India.
- The number of the French department Seine-Saint-Denis, a Paris suburb with high proportions of immigrants and low-income people, and as such used by many French rappers and those emulating their speech.[11][12]
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".[13]
See also
- AD 93, a year in the Julian calendar
- List of highways numbered 93
- Ninety-Three (Quatrevingt-treize), a novel concerning the French Revolution by Victor Hugo
- 93 (Thelema), a greeting among Thelemites based on the numerological (gematric) value of Thelema (Will) and Agape (Love) in Greek letters.[14]
- Babia 93, an album from a Pakistani pop singer Sajjad Ali
- London's 93 Feet East music venue
- Current 93, a musical project of David Tibet
- Los Angeles 93 KHJ radio
- United Airlines Flight 93, one of the airplanes hijacked on September 11, 2001.
- 93 'til Infinity, the debut album by Oakland hip hop group Souls of Mischief.
References
External links
