No, 198 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
198 has divisors other than 1 and itself. The smallest is 2: 198 ÷ 2 = 99.
Prime factorization: 198 = 2 × 3 × 3 × 11 = 2 × 3² × 11.
| Number | Prime? |
|---|---|
| 194 | No, 2 × 97 |
| 195 | No, 3 × 5 × 13 |
| 196 | No, 2 × 2 × 7 × 7 |
| 197 | Yes |
| 199 | Yes |
| 200 | No, 2 × 2 × 2 × 5 × 5 |
| 201 | No, 3 × 67 |
| 202 | No, 2 × 101 |
More about 198: factors of 198 · square root of 198 · 198 in binary.
Another number? Use the prime number checker for any value, or see the list of prime numbers.