981

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

What does the number 981 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 6 divisors.

981 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of six divisors.

Prime factorization of 981:

3² × 109

(3 × 3 × 109)

See below for interesting mathematical facts about the number 981 from the Numbermatics database.

Names of 981

Cardinal: 981 can be written as Nine hundred eighty-one.

Scientific notation

Scientific notation: 9.81 × 10²

Factors of 981

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 3
Sum of prime factors: 112

Divisors of 981

Number of divisors d(n): 6
Complete list of divisors:
1 3 9 109 327 981
Sum of all divisors σ(n): 1430
Sum of proper divisors (its aliquot sum) s(n): 449
981 is a deficient number, because the sum of its proper divisors (449) is less than itself. Its deficiency is 532

Bases of 981

Binary: 1111010101₂
Hexadecimal: 0x3D5
Base-36: R9

Squares and roots of 981

981 squared (981²) is 962361
981 cubed (981³) is 944076141
The square root of 981 is 31.3209195267
The cube root of 981 is 9.9362612673

Scales and comparisons

How big is 981?

981 seconds is equal to 16 minutes, 21 seconds.
To count from 1 to 981 would take you about eight 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 981 cubic inches would be around 0.8 feet tall.

Recreational maths with 981

981 backwards is 189
The number of decimal digits it has is: 3
The sum of 981's digits is 18
More coming soon!

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The information we have on file for 981 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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