# 621

## 621 is an odd composite number composed of two prime numbers multiplied together.

What does the number 621 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 8 divisors.

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

## Prime factorization of 621:

### 33 × 23

(3 × 3 × 3 × 23)

See below for interesting mathematical facts about the number 621 from the Numbermatics database.

### Names of 621

• Cardinal: 621 can be written as Six hundred twenty-one.

### Scientific notation

• Scientific notation: 6.21 × 102

### Factors of 621

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 26

### Divisors of 621

• Number of divisors d(n): 8
• Complete list of divisors:
• Sum of all divisors σ(n): 960
• Sum of proper divisors (its aliquot sum) s(n): 339
• 621 is a deficient number, because the sum of its proper divisors (339) is less than itself. Its deficiency is 282

### Bases of 621

• Binary: 10011011012
• Base-36: H9

### Squares and roots of 621

• 621 squared (6212) is 385641
• 621 cubed (6213) is 239483061
• The square root of 621 is 24.9198715887
• The cube root of 621 is 8.5316009395

### Scales and comparisons

How big is 621?
• 621 seconds is equal to 10 minutes, 21 seconds.
• To count from 1 to 621 would take you about five 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 621 cubic inches would be around 0.7 feet tall.

### Recreational maths with 621

• 621 backwards is 126
• 621 is a Harshad number.
• The number of decimal digits it has is: 3
• The sum of 621's digits is 9
• More coming soon!