397

397 is a prime number. Like all primes greater than two, it is odd and has no factors apart from itself and one.

What does the number 397 look like?

As a prime, it is not composed of any other numbers and has no internal structure.

397 is a prime number. Like all primes (except two), it is an odd number.

Prime factorization of 397:

397

See below for interesting mathematical facts about the number 397 from the Numbermatics database.


Names of 397

  • Cardinal: 397 can be written as Three hundred ninety-seven.

Scientific notation

  • Scientific notation: 3.97 × 102

Factors of 397

  • Number of distinct prime factors ω(n): 1
  • Total number of prime factors Ω(n): 1
  • Sum of prime factors: 397

Divisors of 397

  • Number of divisors d(n): 2
  • Complete list of divisors:
    1 397
  • Sum of all divisors σ(n): 398
  • Sum of proper divisors (its aliquot sum) s(n): 1
  • 397 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 396

Bases of 397

  • Binary: 1100011012
  • Hexadecimal: 0x18D
  • Base-36: B1

Squares and roots of 397

  • 397 squared (3972) is 157609
  • 397 cubed (3973) is 62570773
  • The square root of 397 is 19.9248588451
  • The cube root of 397 is 7.3495965965

Scales and comparisons

How big is 397?
  • 397 seconds is equal to 6 minutes, 37 seconds.
  • To count from 1 to 397 would take you about three 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 397 cubic inches would be around 0.6 feet tall.

Recreational maths with 397

  • 397 backwards is 793
  • The number of decimal digits it has is: 3
  • The sum of 397's digits is 19
  • More coming soon!

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The information we have on file for 397 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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