# 13987

## 13,987 is an odd composite number composed of two prime numbers multiplied together.

What does the number 13987 look like?

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

13987 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 13987:

### 71 × 197

See below for interesting mathematical facts about the number 13987 from the Numbermatics database.

### Names of 13987

• Cardinal: 13987 can be written as Thirteen thousand, nine hundred eighty-seven.

### Scientific notation

• Scientific notation: 1.3987 × 104

### Factors of 13987

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 268

### Divisors of 13987

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 14256
• Sum of proper divisors (its aliquot sum) s(n): 269
• 13987 is a deficient number, because the sum of its proper divisors (269) is less than itself. Its deficiency is 13718

### Bases of 13987

• Binary: 110110101000112
• Base-36: ASJ

### Squares and roots of 13987

• 13987 squared (139872) is 195636169
• 13987 cubed (139873) is 2736363095803
• The square root of 13987 is 118.2666478767
• The cube root of 13987 is 24.0939603673

### Scales and comparisons

How big is 13987?
• 13,987 seconds is equal to 3 hours, 53 minutes, 7 seconds.
• To count from 1 to 13,987 would take you about three 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 13987 cubic inches would be around 2 feet tall.

### Recreational maths with 13987

• 13987 backwards is 78931
• The number of decimal digits it has is: 5
• The sum of 13987's digits is 28
• More coming soon!

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Numbermatics. (2022). Number 13987 - Facts about the integer. Retrieved 9 August 2022, from https://numbermatics.com/n/13987/

Chicago style:
Numbermatics. 2022. "Number 13987 - Facts about the integer". https://numbermatics.com/n/13987/

The information we have on file for 13987 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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