No, 39 is not a prime number. It is a composite number: its digits add up to 12, which is divisible by 3, so 39 is divisible by 3.
39 has divisors other than 1 and itself. The smallest is 3: 39 ÷ 3 = 13.
Prime factorization: 39 = 3 × 13.
| Number | Prime? |
|---|---|
| 35 | No, 5 × 7 |
| 36 | No, 2 × 2 × 3 × 3 |
| 37 | Yes |
| 38 | No, 2 × 19 |
| 40 | No, 2 × 2 × 2 × 5 |
| 41 | Yes |
| 42 | No, 2 × 3 × 7 |
| 43 | Yes |
More about 39: factors of 39 · 39 squared · square root of 39 · 39 in binary · 39 in Roman numerals.
Another number? Use the prime number checker for any value, or see the list of prime numbers.