The Natural Number 7

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Properties of the Number 7

  • Because 7 is not divisible by 2 ...
    • 7 is an odd number
    • 7 has parity 1
    • 7 is not an even number
  • Because 7 has only 1 and itself as divisors ...
    • 7 is a prime number
    • 7 is not a composite number

Alternative Representations of the Number 7

  • Base 2 (binary): 111
  • Base 8 (octal): 7
  • Base 16 (hexadecimal): 7
  • Roman numeral: VII
  • Words: seven

Divisors of the Number 7

  • 7 has 2 positive divisors: 1, 7
    • The sum of the positive divisors is 8
  • 7 has 1 proper divisor: 1
    • The sum of the proper divisors is 1
  • 7 is a deficient number since the sum of the proper divisors is less than 7
  • 7 is not a perfect number
  • 7 is not an abundant number

More Properties of the Number 7

  • 7 is not a square number
  • 7 is not a cube number
  • 7 is a palindromic number (i.e., the digits are the same forwards and backwards)
  • 7 is not a Fibonacci number
  • 7 is a Lucas number

9:53 am, Saturday, March 25, 2017 (UTC; +0000)
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