No, 477 is not a prime number. It is a composite number: its digits add up to 18, which is divisible by 3, so 477 is divisible by 3.
477 has divisors other than 1 and itself. The smallest is 3: 477 ÷ 3 = 159.
Prime factorization: 477 = 3 × 3 × 53 = 3² × 53.
| Number | Prime? |
|---|---|
| 473 | No, 11 × 43 |
| 474 | No, 2 × 3 × 79 |
| 475 | No, 5 × 5 × 19 |
| 476 | No, 2 × 2 × 7 × 17 |
| 478 | No, 2 × 239 |
| 479 | Yes |
| 480 | No, 2 × 2 × 2 × 2 × 2 × 3 × 5 |
| 481 | No, 13 × 37 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.