93 (number)
From Infogalactic: the planetary knowledge core
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Cardinal | ninety-three | |||
Ordinal | 93rd (ninety-third) |
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Factorization | 3 × 31 | |||
Divisors | 1, 3, 31, 93 | |||
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 twenty-eighth distinct semiprime[1] and the ninth of the form (3.q).[2]
- the first number in the third triplet of consecutive semiprimes, 93, 94, and 95.[3]
- 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, and as such used by many French gangsta 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
- 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 value of Thelema (Will) and Agape (Love) in Greek letters.
- Babia 93, an album from a Pakistani pop singer Sajjad Ali
- London's 93 Feet East music venue
- Los Angeles 93 KHJ radio
- United Airlines Flight 93, one of the airplanes hijacked on September 11, 2001.
References
- ↑ "Sloane's A001358 ", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ "Sloane's A001748 ", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ "Sloane's A056809 ", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ "Sloane's A016105 ", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ "Sloane's A048330 ", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ "Sloane's A000959 ", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ "Sloane's A000125 ", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ "Sloane's A000926 ", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ "Sloane's A000048 ", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
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External links
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