The Natural Number 91

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Properties of the Number 91

  • Because 91 is not divisible by 2 ...
    • 91 is an odd number
    • 91 has parity 1
    • 91 is not an even number
  • Because 91 can be factored as 7 x 13 ...
    • 91 is a composite number
    • 91 is not a prime number

Alternative Representations of the Number 91

  • Base 2 (binary): 1011011
  • Base 8 (octal): 133
  • Base 16 (hexadecimal): 5B
  • Roman numeral: XCI
  • Words: ninety-one

Divisors of the Number 91

  • 91 has 4 positive divisors: 1, 7, 13, 91
    • The sum of the positive divisors is 112
  • 91 has 3 proper divisors: 1, 7, 13
    • The sum of the proper divisors is 21
  • 91 is a deficient number since the sum of the proper divisors is less than 91
  • 91 is not a perfect number
  • 91 is not an abundant number

More Properties of the Number 91

  • 91 is not a square number
  • 91 is not a cube number
  • 91 is not a palindromic number
  • 91 is not a Fibonacci number
  • 91 is not a Lucas number

12:23 am, Wednesday, May 24, 2017 (UTC; +0000)
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