The Natural Number 13

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Properties of the Number 13

  • Because 13 is not divisible by 2 ...
    • 13 is an odd number
    • 13 has parity 1
    • 13 is not an even number
  • Because 13 has only 1 and itself as divisors ...
    • 13 is a prime number
    • 13 is not a composite number

Alternative Representations of the Number 13

  • Base 2 (binary): 1101
  • Base 8 (octal): 15
  • Base 16 (hexadecimal): D
  • Roman numeral: XIII
  • Words: thirteen

Divisors of the Number 13

  • 13 has 2 positive divisors: 1, 13
    • The sum of the positive divisors is 14
  • 13 has 1 proper divisor: 1
    • The sum of the proper divisors is 1
  • 13 is a deficient number since the sum of the proper divisors is less than 13
  • 13 is not a perfect number
  • 13 is not an abundant number

More Properties of the Number 13

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

10:54 am, Thursday, April 27, 2017 (UTC; +0000)
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