2991

2,991 is an odd composite number composed of two prime numbers multiplied together.

What does the number 2991 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

2991 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

Prime factorization of 2991:

3 × 997

See below for interesting mathematical facts about the number 2991 from the Numbermatics database.


Names of 2991

  • Cardinal: 2991 can be written as Two thousand, nine hundred ninety-one.

Scientific notation

  • Scientific notation: 2.991 × 103

Factors of 2991

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 1000

Divisors of 2991

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 3992
  • Sum of proper divisors (its aliquot sum) s(n): 1001
  • 2991 is a deficient number, because the sum of its proper divisors (1001) is less than itself. Its deficiency is 1990

Bases of 2991

  • Binary: 1011101011112
  • Hexadecimal: 0xBAF
  • Base-36: 2B3

Squares and roots of 2991

  • 2991 squared (29912) is 8946081
  • 2991 cubed (29913) is 26757728271
  • The square root of 2991 is 54.6900356555
  • The cube root of 2991 is 14.4080587607

Scales and comparisons

How big is 2991?
  • 2,991 seconds is equal to 49 minutes, 51 seconds.
  • To count from 1 to 2,991 would take you about forty-nine 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 2991 cubic inches would be around 1.2 feet tall.

Recreational maths with 2991

  • 2991 backwards is 1992
  • The number of decimal digits it has is: 4
  • The sum of 2991's digits is 21
  • More coming soon!

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The information we have on file for 2991 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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