No, 378 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
378 has divisors other than 1 and itself. The smallest is 2: 378 ÷ 2 = 189.
Prime factorization: 378 = 2 × 3 × 3 × 3 × 7 = 2 × 3³ × 7.
| Number | Prime? |
|---|---|
| 374 | No, 2 × 11 × 17 |
| 375 | No, 3 × 5 × 5 × 5 |
| 376 | No, 2 × 2 × 2 × 47 |
| 377 | No, 13 × 29 |
| 379 | Yes |
| 380 | No, 2 × 2 × 5 × 19 |
| 381 | No, 3 × 127 |
| 382 | No, 2 × 191 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.