Is 89 a prime number?
Yes, 89 is a prime number. Its only factors are 1 and 89.
Is 89 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 √89 ≈ 9.43. If none of them divides 89, it is prime.
- 3
None of them divides 89, so it is prime.
Testing 89 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 89 ÷ 2 | leaves 1 |
| 3 | 89 ÷ 3 | leaves 2 |
| 5 | 89 ÷ 5 | leaves 4 |
| 7 | 89 ÷ 7 | leaves 5 |
Questions
Is 89 a prime number?
Yes, 89 is a prime number. Its only factors are 1 and 89.
What is the next prime after 89?
97.
What is the prime number before 89?
83.
What are the factors of 89?
1, 89.