93 (number)
From HandWiki
Short description: Natural number
| ||||
|---|---|---|---|---|
| Cardinal | ninety-three | |||
| Ordinal | 93rd (ninety-third) | |||
| Factorization | 3 × 31 | |||
| Divisors | 1, 3, 31, 93 | |||
| Greek numeral | ϞΓ´ | |||
| Roman numeral | XCIII | |||
| Binary | 10111012 | |||
| Ternary | 101103 | |||
| Quaternary | 11314 | |||
| Quinary | 3335 | |||
| Senary | 2336 | |||
| Octal | 1358 | |||
| Duodecimal | 7912 | |||
| Hexadecimal | 5D16 | |||
| Vigesimal | 4D20 | |||
| Base 36 | 2L36 | |||
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
- ↑ Sloane, N. J. A., ed. "Sequence A001358". OEIS Foundation. https://oeis.org/A001358.
- ↑ Sloane, N. J. A., ed. "Sequence A001748". OEIS Foundation. https://oeis.org/A001748.
- ↑ Sloane, N. J. A., ed. "Sequence A056809". OEIS Foundation. https://oeis.org/A056809.
- ↑ Sloane, N. J. A., ed. "Sequence A016105". OEIS Foundation. https://oeis.org/A016105.
- ↑ Sloane, N. J. A., ed. "Sequence A048330". OEIS Foundation. https://oeis.org/A048330.
- ↑ Sloane, N. J. A., ed. "Sequence A000959". OEIS Foundation. https://oeis.org/A000959.
- ↑ Sloane, N. J. A., ed. "Sequence A000125". OEIS Foundation. https://oeis.org/A000125.
- ↑ Sloane, N. J. A., ed. "Sequence A000926". OEIS Foundation. https://oeis.org/A000926.
- ↑ Sloane, N. J. A., ed. "Sequence A000048". OEIS Foundation. https://oeis.org/A000048.
- ↑ Diaconis, Persi; Graham, Ron (2012), "Chapter 5: From the Gilbreath Principle to the Mandelbrot Set", Magical Mathematics: the mathematical ideas that animate great magic tricks, Princeton University Press, pp. 61–83.
- ↑ Durand, Alain-Philippe (2002), Black, Blanc, Beur: Rap Music and Hip-Hop Culture in the Francophone World, Scarecrow Press, p. 55, ISBN 9780810844315, https://books.google.com/books?id=cMq4ni2BQowC&pg=PA55.
- ↑ Meltzer, Marisa; Shepherd, Julianne (March 2006), "Spitting Fire", Spin: 76–81, https://books.google.com/books?id=J98-LX7jemQC&pg=RA1-PT5.
- ↑ Bloom, Jonathan M. (Spring 2002), "Hand sums: The ancient art of counting on your fingers", Boston College Magazine, http://bcm.bc.edu/issues/spring_2002/ll_hand.html.
- ↑ Campbell, Colin D. (2018). Thelema: an introduction to the life, work & philosophy of Aleister Crowley. Woodbury, Minnesota. ISBN 9780738755236.
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