139781729

Names of 139781729

• Cardinal: 139781729 can be written as One hundred thirty-nine million, seven hundred eighty-one thousand, seven hundred twenty-nine.

Scientific notation

• Scientific notation: 1.39781729 × 10⁸

Factors of 139781729

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 23646

Divisors of 139781729

• Number of divisors d(n): 4
• Complete list of divisors:
  1 11783 11863 139781729
• Sum of all divisors σ(n): 139805376
• Sum of proper divisors (its aliquot sum) s(n): 23647
• 139781729 is a deficient number, because the sum of its proper divisors (23647) is less than itself. Its deficiency is 139758082

Bases of 139781729

• Binary: 1000010101001110011001100001₂
• Hexadecimal: 0x854E661
• Base-36: 2B809T

Squares and roots of 139781729

• 139781729 squared (139781729²) is 19538931762229441
• 139781729 cubed (139781729³) is 2731185664537448157683489
• The square root of 139781729 is 11822.9323350851
• The cube root of 139781729 is 518.9794196147

Scales and comparisons

• 139,781,729 seconds is equal to 4 years, 23 weeks, 20 hours, 15 minutes, 29 seconds.
• To count from 1 to 139,781,729 would take you about six years!

  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 139781729 cubic inches would be around 43.2 feet tall.

Recreational maths with 139781729

• 139781729 backwards is 927187931
• The number of decimal digits it has is: 9
• The sum of 139781729's digits is 47
• More coming soon!