No, 289 is not a prime number. It is a composite number: 289 = 17 × 17.
289 has divisors other than 1 and itself. The smallest is 17: 289 ÷ 17 = 17.
Prime factorization: 289 = 17 × 17 = 17².
| Number | Prime? |
|---|---|
| 285 | No, 3 × 5 × 19 |
| 286 | No, 2 × 11 × 13 |
| 287 | No, 7 × 41 |
| 288 | No, 2 × 2 × 2 × 2 × 2 × 3 × 3 |
| 290 | No, 2 × 5 × 29 |
| 291 | No, 3 × 97 |
| 292 | No, 2 × 2 × 73 |
| 293 | Yes |
Another number? Use the prime number checker for any value, or see the list of prime numbers.