# 1987

## 1,987 is a prime number. Like all primes greater than two, it is odd and has no factors apart from itself and one.

What does the number 1987 look like?

As a prime, it is not composed of any other numbers and has no internal structure.

1987 is a prime number. Like all primes (except two), it is an odd number.

## Prime factorization of 1987:

### 1987

See below for interesting mathematical facts about the number 1987 from the Numbermatics database.

### Names of 1987

• Cardinal: 1987 can be written as One thousand, nine hundred eighty-seven.

### Scientific notation

• Scientific notation: 1.987 × 103

### Factors of 1987

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 1987

### Divisors of 1987

• Number of divisors d(n): 2
• Complete list of divisors:
• Sum of all divisors σ(n): 1988
• Sum of proper divisors (its aliquot sum) s(n): 1
• 1987 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 1986

### Bases of 1987

• Binary: 111110000112
• Base-36: 1J7

### Squares and roots of 1987

• 1987 squared (19872) is 3948169
• 1987 cubed (19873) is 7845011803
• The square root of 1987 is 44.5757781761
• The cube root of 1987 is 12.5718528487

### Scales and comparisons

How big is 1987?
• 1,987 seconds is equal to 33 minutes, 7 seconds.
• To count from 1 to 1,987 would take you about thirty-three 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 1987 cubic inches would be around 1 feet tall.

### Recreational maths with 1987

• 1987 backwards is 7891
• The number of decimal digits it has is: 4
• The sum of 1987's digits is 25
• More coming soon!