No, 441 is not a prime number. It is a composite number: its digits add up to 9, which is divisible by 3, so 441 is divisible by 3.
441 has divisors other than 1 and itself. The smallest is 3: 441 ÷ 3 = 147.
Prime factorization: 441 = 3 × 3 × 7 × 7 = 3² × 7².
| Number | Prime? |
|---|---|
| 437 | No, 19 × 23 |
| 438 | No, 2 × 3 × 73 |
| 439 | Yes |
| 440 | No, 2 × 2 × 2 × 5 × 11 |
| 442 | No, 2 × 13 × 17 |
| 443 | Yes |
| 444 | No, 2 × 2 × 3 × 37 |
| 445 | No, 5 × 89 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.