# 6391

## 6,391 is an odd composite number composed of three prime numbers multiplied together.

What does the number 6391 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 8 divisors.

6391 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.

## Prime factorization of 6391:

### 7 × 11 × 83

See below for interesting mathematical facts about the number 6391 from the Numbermatics database.

### Names of 6391

• Cardinal: 6391 can be written as Six thousand, three hundred ninety-one.

### Scientific notation

• Scientific notation: 6.391 × 103

### Factors of 6391

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 101

### Divisors of 6391

• Number of divisors d(n): 8
• Complete list of divisors:
• Sum of all divisors σ(n): 8064
• Sum of proper divisors (its aliquot sum) s(n): 1673
• 6391 is a deficient number, because the sum of its proper divisors (1673) is less than itself. Its deficiency is 4718

### Bases of 6391

• Binary: 11000111101112
• Base-36: 4XJ

### Squares and roots of 6391

• 6391 squared (63912) is 40844881
• 6391 cubed (63913) is 261039634471
• The square root of 6391 is 79.9437302107
• The cube root of 6391 is 18.5576482727

### Scales and comparisons

How big is 6391?
• 6,391 seconds is equal to 1 hour, 46 minutes, 31 seconds.
• To count from 1 to 6,391 would take you about forty-six 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 6391 cubic inches would be around 1.5 feet tall.

### Recreational maths with 6391

• 6391 backwards is 1936
• The number of decimal digits it has is: 4
• The sum of 6391's digits is 19
• More coming soon!