Is 389 a prime number?
Yes, 389 is a prime number. Its only factors are 1 and 389.
Is 389 prime?
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A prime number has exactly two factors: 1 and itself.
- 2
It is enough to test the primes up to √389 ≈ 19.72. If none of them divides 389, it is prime.
- 3
None of them divides 389, so it is prime.
Testing 389 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 389 ÷ 2 | leaves 1 |
| 3 | 389 ÷ 3 | leaves 2 |
| 5 | 389 ÷ 5 | leaves 4 |
| 7 | 389 ÷ 7 | leaves 4 |
| 11 | 389 ÷ 11 | leaves 4 |
| 13 | 389 ÷ 13 | leaves 12 |
| 17 | 389 ÷ 17 | leaves 15 |
| 19 | 389 ÷ 19 | leaves 9 |
Questions
Is 389 a prime number?
Yes, 389 is a prime number. Its only factors are 1 and 389.
What is the next prime after 389?
397.
What is the prime number before 389?
383.
What are the factors of 389?
1, 389.