Girish Mahajan (Editor)

93 (number)

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93
  
94 →

Ordinal
  
93rd (ninety-third)

Divisors
  
1, 3, 31, 93

Cardinal
  
ninety-three

Factorization
  
3 × 31

Roman numeral
  
XCIII

93 (ninety-three) is the natural number following 92 and preceding 94.

Contents

In mathematics

93 is:

  • the twenty-eighth distinct semiprime 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, since its two prime factors, 3 and 31 are both Gaussian primes.
  • a repdigit in base 5 (3335), and 30 (3330).
  • palindromic in bases 2, 5, and 30.
  • a lucky number.
  • a cake number.
  • an idoneal number.

    • There are 93 different cyclic Gilbreath permutations on 11 elements, and therefore there are 93 different real periodic points of order 11 on the Mandelbrot set.

    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.

    • 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".

    References

    93 (number) Wikipedia
    (Text) CC BY-SA


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