6391

6,391 is an odd composite number composed of three prime numbers multiplied together.

What does the number 6391 look like?

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

6391 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 6391:

7 × 11 × 83

See below for interesting mathematical facts about the number 6391 from the Numbermatics database.


Names of 6391

  • Cardinal: 6391 can be written as Six thousand, three hundred ninety-one.

Scientific notation

  • Scientific notation: 6.391 × 103

Factors of 6391

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 3
  • Sum of prime factors: 101

Divisors of 6391

  • Number of divisors d(n): 8
  • Complete list of divisors:
  • Sum of all divisors σ(n): 8064
  • Sum of proper divisors (its aliquot sum) s(n): 1673
  • 6391 is a deficient number, because the sum of its proper divisors (1673) is less than itself. Its deficiency is 4718

Bases of 6391

  • Binary: 11000111101112
  • Hexadecimal: 0x18F7
  • Base-36: 4XJ

Squares and roots of 6391

  • 6391 squared (63912) is 40844881
  • 6391 cubed (63913) is 261039634471
  • The square root of 6391 is 79.9437302107
  • The cube root of 6391 is 18.5576482727

Scales and comparisons

How big is 6391?
  • 6,391 seconds is equal to 1 hour, 46 minutes, 31 seconds.
  • To count from 1 to 6,391 would take you about forty-six 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 6391 cubic inches would be around 1.5 feet tall.

Recreational maths with 6391

  • 6391 backwards is 1936
  • The number of decimal digits it has is: 4
  • The sum of 6391's digits is 19
  • More coming soon!

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The information we have on file for 6391 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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