987

987 is an odd composite number composed of three prime numbers multiplied together.

What does the number 987 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 8 divisors.

987 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.

Prime factorization of 987:

3 × 7 × 47

See below for interesting mathematical facts about the number 987 from the Numbermatics database.


Names of 987

  • Cardinal: 987 can be written as Nine hundred eighty-seven.

Scientific notation

  • Scientific notation: 9.87 × 102

Factors of 987

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 3
  • Sum of prime factors: 57

Divisors of 987

  • Number of divisors d(n): 8
  • Complete list of divisors:
  • Sum of all divisors σ(n): 1536
  • Sum of proper divisors (its aliquot sum) s(n): 549
  • 987 is a deficient number, because the sum of its proper divisors (549) is less than itself. Its deficiency is 438

Bases of 987

  • Binary: 11110110112
  • Hexadecimal: 0x3DB
  • Base-36: RF

Squares and roots of 987

  • 987 squared (9872) is 974169
  • 987 cubed (9873) is 961504803
  • The square root of 987 is 31.4165561449
  • The cube root of 987 is 9.9564775209

Scales and comparisons

How big is 987?
  • 987 seconds is equal to 16 minutes, 27 seconds.
  • To count from 1 to 987 would take you about eight minutes.

    This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

  • A cube with a volume of 987 cubic inches would be around 0.8 feet tall.

Recreational maths with 987

  • 987 backwards is 789
  • The number of decimal digits it has is: 3
  • The sum of 987's digits is 24
  • More coming soon!

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The information we have on file for 987 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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