393

393 is an odd composite number composed of two prime numbers multiplied together.

What does the number 393 look like?

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

393 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 393:

3 × 131

See below for interesting mathematical facts about the number 393 from the Numbermatics database.


Names of 393

  • Cardinal: 393 can be written as Three hundred ninety-three.

Scientific notation

  • Scientific notation: 3.93 × 102

Factors of 393

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 134

Divisors of 393

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 528
  • Sum of proper divisors (its aliquot sum) s(n): 135
  • 393 is a deficient number, because the sum of its proper divisors (135) is less than itself. Its deficiency is 258

Bases of 393

  • Binary: 1100010012
  • Hexadecimal: 0x189
  • Base-36: AX

Squares and roots of 393

  • 393 squared (3932) is 154449
  • 393 cubed (3933) is 60698457
  • The square root of 393 is 19.8242276013
  • The cube root of 393 is 7.3248294445

Scales and comparisons

How big is 393?
  • 393 seconds is equal to 6 minutes, 33 seconds.
  • To count from 1 to 393 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 393 cubic inches would be around 0.6 feet tall.

Recreational maths with 393

  • 393 is the same when its digits are reversed! That makes it a palindromic number.
  • The number of decimal digits it has is: 3
  • The sum of 393's digits is 15
  • More coming soon!

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The information we have on file for 393 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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