No, 164 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
164 has divisors other than 1 and itself. The smallest is 2: 164 ÷ 2 = 82.
Prime factorization: 164 = 2 × 2 × 41 = 2² × 41.
| Number | Prime? |
|---|---|
| 160 | No, 2 × 2 × 2 × 2 × 2 × 5 |
| 161 | No, 7 × 23 |
| 162 | No, 2 × 3 × 3 × 3 × 3 |
| 163 | Yes |
| 165 | No, 3 × 5 × 11 |
| 166 | No, 2 × 83 |
| 167 | Yes |
| 168 | No, 2 × 2 × 2 × 3 × 7 |
More about 164: factors of 164 · square root of 164 · 164 in binary.
Another number? Use the prime number checker for any value, or see the list of prime numbers.