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1 In mathematics  





2 In the military  





3 In transportation  





4 In other fields  





5 See also  





6 References  














133 (number)






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← 132 133 134 →

130 131 132 133 134 135 136 137 138 139

  • Integers
  • 0 100 200 300 400 500 600 700 800 900

    Cardinalone hundred thirty-three
    Ordinal133rd
    (one hundred thirty-third)
    Factorization7 × 19
    Divisors1, 7, 19, 133
    Greek numeralΡΛΓ´
    Roman numeralCXXXIII
    Binary100001012
    Ternary112213
    Senary3416
    Octal2058
    DuodecimalB112
    Hexadecimal8516

    133 (one hundred [and] thirty-three) is the natural number following 132 and preceding 134.

    In mathematics

    [edit]

    133 is an n whose divisors (excluding n itself) added up divide φ(n). It is an octagonal number[1] and a happy number.[2]

    133 is a Harshad number, because it is divisible by the sum of its digits.

    133 is a repdigitinbase 11 (111) and base 18 (77), whilst in base 20 it is a cyclic number formed from the reciprocalofthe number three.

    133 is a semiprime: a product of two prime numbers, namely 7 and 19. Since those prime factors are Gaussian primes, this means that 133 is a Blum integer.

    133 is the number of compositions of 13 into distinct parts.[3]

    In the military

    [edit]

    In transportation

    [edit]

    In other fields

    [edit]

    133 is also:

    See also

    [edit]

    References

    [edit]
    1. ^ "Sloane's A000567 : Octagonal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-27.
  • ^ "Sloane's A007770 : Happy numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-27.
  • ^ Sloane, N. J. A. (ed.). "Sequence A032020 (Number of compositions (ordered partitions) of n into distinct parts)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2022-05-24.
  • ^ Porter, Darwin; Danforth Prince (2009). Frommer's Austria. Hoboken, New Jersey: Frommer's. p. 482. ISBN 978-0-470-39897-5.

  • Retrieved from "https://en.wikipedia.org/w/index.php?title=133_(number)&oldid=1183097477"

    Category: 
    Integers
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