# 39

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

What does the number 39 look like?

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

39 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 39:

### 3 × 13

See below for interesting mathematical facts about the number 39 from the Numbermatics database.

### Names of 39

• Cardinal: 39 can be written as Thirty-nine.

### Scientific notation

• Scientific notation: 3.9 × 101

### Factors of 39

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 16

### Divisors of 39

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 56
• Sum of proper divisors (its aliquot sum) s(n): 17
• 39 is a deficient number, because the sum of its proper divisors (17) is less than itself. Its deficiency is 22

### Bases of 39

• Binary: 1001112
• Base-36: 13

### Squares and roots of 39

• 39 squared (392) is 1521
• 39 cubed (393) is 59319
• The square root of 39 is 6.2449979984
• The cube root of 39 is 3.3912114431

### Scales and comparisons

How big is 39?
• A cube with a volume of 39 cubic inches would be around 0.3 feet tall.

### Recreational maths with 39

• 39 backwards is 93
• The number of decimal digits it has is: 2
• The sum of 39's digits is 12
• More coming soon!