No, 381 is not a prime number. It is a composite number: its digits add up to 12, which is divisible by 3, so 381 is divisible by 3.
381 has divisors other than 1 and itself. The smallest is 3: 381 ÷ 3 = 127.
Prime factorization: 381 = 3 × 127.
| Number | Prime? |
|---|---|
| 377 | No, 13 × 29 |
| 378 | No, 2 × 3 × 3 × 3 × 7 |
| 379 | Yes |
| 380 | No, 2 × 2 × 5 × 19 |
| 382 | No, 2 × 191 |
| 383 | Yes |
| 384 | No, 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 |
| 385 | No, 5 × 7 × 11 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.