# 863

## 863 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 863 look like?

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

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

## Prime factorization of 863:

### 863

See below for interesting mathematical facts about the number 863 from the Numbermatics database.

### Names of 863

• Cardinal: 863 can be written as Eight hundred sixty-three.

### Scientific notation

• Scientific notation: 8.63 × 102

### Factors of 863

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 863

### Divisors of 863

• Number of divisors d(n): 2
• Complete list of divisors:
• Sum of all divisors σ(n): 864
• Sum of proper divisors (its aliquot sum) s(n): 1
• 863 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 862

### Bases of 863

• Binary: 11010111112
• Base-36: NZ

### Squares and roots of 863

• 863 squared (8632) is 744769
• 863 cubed (8633) is 642735647
• The square root of 863 is 29.3768616431
• The cube root of 863 is 9.5207303535

### Scales and comparisons

How big is 863?
• 863 seconds is equal to 14 minutes, 23 seconds.
• To count from 1 to 863 would take you about seven 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 863 cubic inches would be around 0.8 feet tall.

### Recreational maths with 863

• 863 backwards is 368
• The number of decimal digits it has is: 3
• The sum of 863's digits is 17
• More coming soon!