169

169 is an odd composite number. It is composed of a single prime number multiplied by itself.

What does the number 169 look like?

This visualization shows the relationship between its 1 prime factors (large circles) and 3 divisors.

169 is an odd composite number. It has a total of three divisors.

Prime factorization of 169:

132

(13 × 13)

See below for interesting mathematical facts about the number 169 from the Numbermatics database.


Names of 169

  • Cardinal: 169 can be written as One hundred sixty-nine.

Scientific notation

  • Scientific notation: 1.69 × 102

Factors of 169

  • Number of distinct prime factors ω(n): 1
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 13

Divisors of 169

  • Number of divisors d(n): 3
  • Complete list of divisors:
    1 13 169
  • Sum of all divisors σ(n): 183
  • Sum of proper divisors (its aliquot sum) s(n): 14
  • 169 is a deficient number, because the sum of its proper divisors (14) is less than itself. Its deficiency is 155

Bases of 169

  • Binary: 101010012
  • Hexadecimal: 0xA9
  • Base-36: 4P

Squares and roots of 169

  • 169 squared (1692) is 28561
  • 169 cubed (1693) is 4826809
  • 169 is a perfect square number. Its square root is 13
  • The cube root of 169 is 5.5287748137

Scales and comparisons

How big is 169?
  • 169 seconds is equal to 2 minutes, 49 seconds.
  • To count from 1 to 169 would take you about twenty-four seconds.

    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 169 cubic inches would be around 0.5 feet tall.

Recreational maths with 169

  • 169 backwards is 961
  • The number of decimal digits it has is: 3
  • The sum of 169's digits is 16
  • More coming soon!

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The information we have on file for 169 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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