9921

9,921 is an odd composite number composed of two prime numbers multiplied together.

What does the number 9921 look like?

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

9921 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 9921:

3 × 3307

See below for interesting mathematical facts about the number 9921 from the Numbermatics database.

Names of 9921

Cardinal: 9921 can be written as Nine thousand, nine hundred twenty-one.

Scientific notation

Scientific notation: 9.921 × 10³

Factors of 9921

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 2
Sum of prime factors: 3310

Divisors of 9921

Number of divisors d(n): 4
Complete list of divisors:
1 3 3307 9921
Sum of all divisors σ(n): 13232
Sum of proper divisors (its aliquot sum) s(n): 3311
9921 is a deficient number, because the sum of its proper divisors (3311) is less than itself. Its deficiency is 6610

Bases of 9921

Binary: 10011011000001₂
Hexadecimal: 0x26C1
Base-36: 7NL

Squares and roots of 9921

9921 squared (9921²) is 98426241
9921 cubed (9921³) is 976486736961
The square root of 9921 is 99.6042167781
The cube root of 9921 is 21.4874633963

Scales and comparisons

How big is 9921?

9,921 seconds is equal to 2 hours, 45 minutes, 21 seconds.
To count from 1 to 9,921 would take you about two hours.

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 9921 cubic inches would be around 1.8 feet tall.

Recreational maths with 9921

9921 backwards is 1299
The number of decimal digits it has is: 4
The sum of 9921's digits is 21
More coming soon!

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The information we have on file for 9921 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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