# 403

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

What does the number 403 look like?

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

403 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 403:

### 13 × 31

See below for interesting mathematical facts about the number 403 from the Numbermatics database.

### Names of 403

• Cardinal: 403 can be written as Four hundred three.

### Scientific notation

• Scientific notation: 4.03 × 102

### Factors of 403

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 44

### Divisors of 403

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 448
• Sum of proper divisors (its aliquot sum) s(n): 45
• 403 is a deficient number, because the sum of its proper divisors (45) is less than itself. Its deficiency is 358

### Bases of 403

• Binary: 1100100112
• Base-36: B7

### Squares and roots of 403

• 403 squared (4032) is 162409
• 403 cubed (4033) is 65450827
• The square root of 403 is 20.0748598999
• The cube root of 403 is 7.3864372953

### Scales and comparisons

How big is 403?
• 403 seconds is equal to 6 minutes, 43 seconds.
• To count from 1 to 403 would take you about 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 403 cubic inches would be around 0.6 feet tall.

### Recreational maths with 403

• 403 backwards is 304
• The number of decimal digits it has is: 3
• The sum of 403's digits is 7
• More coming soon!