93 (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
  1,0) of three numbers to the Prime 13 in the 13
  -Aliquot tree.
• a
  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

• 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
  French rappers and those emulating their speech.^[11][12]

• 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
• 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
• 93 KHJ
  radio
• United Airlines Flight 93, one of the airplanes hijacked on September 11, 2001.
• Oakland hip hop group Souls of Mischief
  .

References

1. ^ Sloane, N. J. A. (ed.). "Sequence A001358". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
2. ^ Sloane, N. J. A. (ed.). "Sequence A001748". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
3. ^ Sloane, N. J. A. (ed.). "Sequence A056809". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
4. ^ Sloane, N. J. A. (ed.). "Sequence A016105". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
5. ^ Sloane, N. J. A. (ed.). "Sequence A048330". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
6. ^ Sloane, N. J. A. (ed.). "Sequence A000959". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
7. ^ Sloane, N. J. A. (ed.). "Sequence A000125". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
8. ^ Sloane, N. J. A. (ed.). "Sequence A000926". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
9. ^ Sloane, N. J. A. (ed.). "Sequence A000048". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
10. 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.
11. ISBN 9780810844315
    .
12. ^ Meltzer, Marisa; Shepherd, Julianne (March 2006), "Spitting Fire", Spin: 76–81.
13. ^ Bloom, Jonathan M. (Spring 2002), "Hand sums: The ancient art of counting on your fingers", Boston College Magazine.
14. ISBN 9780738755236.{{cite book}}: CS1 maint: location missing publisher (link
    )

External links

Wikimedia Commons has media related to 93 (number).

• On the Number 93