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92 (number)

From Wikipedia, the free encyclopedia
Natural number
← 9192 93 →
Cardinalninety-two
Ordinal92nd
(ninety-second)
Factorization22 × 23
Divisors1, 2, 4, 23, 46, 92
Greek numeralϞΒ´
Roman numeralXCII,xcii
Binary10111002
Ternary101023
Senary2326
Octal1348
Duodecimal7812
Hexadecimal5C16

92 (ninety-two) is the natural number following91 and preceding93.

In mathematics

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Form

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92 is acomposite number of the general formp2q, whereq is a higherprime (23). It is the tenth of this form and the eighth of the form 22q.

Properties

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There are 92 "atomic elements" inJohn Conway'slook-and-say sequence, corresponding to the 92 non-transuranic elements in the chemist'speriodic table.

Solids

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The mostfaces or vertices anArchimedean orCatalan solid can have is 92: thesnub dodecahedron has 92 faces while its dual polyhedron, thepentagonal hexecontahedron, has 92 vertices. On the other hand, as asimple polyhedron, thefinal stellation of the icosahedron has 92 vertices.

There are 92Johnson solids.

Abstract algebra

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92 is the total number ofobjects that arepermuted by the series of fivefinite, simpleMathieu groupsMn{\displaystyle \mathbb {M} _{n}} (collectively), as defined by permutations based on elementsn{11,12,22,23,24}{\displaystyle n\in \{11,12,22,23,24\}}. Half of 92 is46 (the largest even number that is not the sum of twoabundant numbers), which is the number ofmaximal subgroups of thefriendly giantF1{\displaystyle \mathbb {F} _{1}}, the largest "sporadic" finite simple group.

In different bases

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92 ispalindromic in other bases, where it is represented as 2326, 1617, 4422, and 2245.

There are 92 numbersn{\displaystyle n} such that2n{\displaystyle 2^{n}} does not contain all digits inbase ten (the largest such number is168, where68 is the smallest number with such a representation containing all digits, followed by70 and79).[9]

In other fields

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Ninety-two is also:

  • The number which runs through almost every single of British film-makerPeter Greenaway's films. This number has special association with the fictional character of Greenaway's creation,Tulse Luper. It is said the number itself is based on a mathematical error in calculations concerningJohn Cage's workIndeterminacy. SeeThe Falls for extensive use of this number.

References

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  1. ^Sloane, N. J. A. (ed.)."Sequence A002808 (The composite numbers.)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2024-05-15.
  2. ^Sloane, N. J. A. (ed.)."Sequence A002322 (Reduced totient function psi(n): least k such that x^k congruent 1 (mod n) for all x prime to n; also known as the Carmichael lambda function (exponent of unit group mod n); also called the universal exponent of n.)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2024-05-15.
  3. ^Sloane, N. J. A. (ed.)."Sequence A000005 (d(n) (also called tau(n) or sigma_0(n)), the number of divisors of n.)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2024-05-15.
  4. ^Sloane, N. J. A. (ed.)."Sequence A003601".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2024-05-15.
  5. ^Sloane, N. J. A. (ed.)."Sequence A102187 (Arithmetic means of divisors of arithmetic numbers (arithmetic numbers, A003601, are those for which the average of the divisors is an integer.)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2024-05-15.
  6. ^Sloane, N. J. A. (ed.)."Sequence A000396 (Perfect numbers k: k is equal to the sum of the proper divisors of k.)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2024-05-15.
  7. ^"Sloane's A000326 : Pentagonal numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-05-29.
  8. ^"Sloane's A059756 : Erdős-Woods numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-05-29.
  9. ^Sloane, N. J. A. (ed.)."Sequence A130696 (Numbers k such that 2^k does not contain all ten decimal digits.)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2024-02-27.
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