Is 789 a prime number?
No, 789 is not a prime number. It is divisible by 3: 789 = 3 × 263.
Is 789 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 √789 ≈ 28.09. If none of them divides 789, it is prime.
- 3
3 divides 789 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 789 = 3 \times 263 \]
Testing 789 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 789 ÷ 2 | leaves 1 |
| 3 | 789 ÷ 3 | divides exactly (263) |
| 5 | 789 ÷ 5 | leaves 4 |
| 7 | 789 ÷ 7 | leaves 5 |
| 11 | 789 ÷ 11 | leaves 8 |
| 13 | 789 ÷ 13 | leaves 9 |
| 17 | 789 ÷ 17 | leaves 7 |
| 19 | 789 ÷ 19 | leaves 10 |
| 23 | 789 ÷ 23 | leaves 7 |
Questions
Is 789 a prime number?
No, 789 is not a prime number. It is divisible by 3: 789 = 3 × 263.
What is the next prime after 789?
797.
What is the prime number before 789?
787.
What are the factors of 789?
1, 3, 263, 789.