81989739

81,989,739 is an odd composite number composed of three prime numbers multiplied together.

What does the number 81989739 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 20 divisors.

81989739 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twenty divisors.

Prime factorization of 81989739:

3⁴ × 13 × 77863

(3 × 3 × 3 × 3 × 13 × 77863)

See below for interesting mathematical facts about the number 81989739 from the Numbermatics database.

Names of 81989739

Cardinal: 81989739 can be written as Eighty-one million, nine hundred eighty-nine thousand, seven hundred thirty-nine.

Scientific notation

Scientific notation: 8.1989739 × 10⁷

Factors of 81989739

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 6
Sum of prime factors: 77879

Divisors of 81989739

Number of divisors d(n): 20
Complete list of divisors:
1 3 9 13 27 39 81 117 351 1053 77863 233589 700767 1012219 2102301 3036657 6306903 9109971 27329913 81989739
Sum of all divisors σ(n): 131901616
Sum of proper divisors (its aliquot sum) s(n): 49911877
81989739 is a deficient number, because the sum of its proper divisors (49911877) is less than itself. Its deficiency is 32077862

Bases of 81989739

Binary: 100111000110001000001101011₂
Hexadecimal: 0x4E3106B
Base-36: 1CTBOR

Squares and roots of 81989739

81989739 squared (81989739²) is 6722317301288121
81989739 cubed (81989739³) is 551161041007797404590419
The square root of 81989739 is 9054.8185514675
The cube root of 81989739 is 434.4300263883

Scales and comparisons

How big is 81989739?

81,989,739 seconds is equal to 2 years, 31 weeks, 3 days, 22 hours, 55 minutes, 39 seconds.
To count from 1 to 81,989,739 would take you about three 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 81989739 cubic inches would be around 36.2 feet tall.

Recreational maths with 81989739

81989739 backwards is 93798918
The number of decimal digits it has is: 8
The sum of 81989739's digits is 54
More coming soon!

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The information we have on file for 81989739 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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