Is 489 a prime number?
No, 489 is not a prime number. It is divisible by 3: 489 = 3 × 163.
Is 489 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 √489 ≈ 22.11. If none of them divides 489, it is prime.
- 3
3 divides 489 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 489 = 3 \times 163 \]
Testing 489 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 489 ÷ 2 | leaves 1 |
| 3 | 489 ÷ 3 | divides exactly (163) |
| 5 | 489 ÷ 5 | leaves 4 |
| 7 | 489 ÷ 7 | leaves 6 |
| 11 | 489 ÷ 11 | leaves 5 |
| 13 | 489 ÷ 13 | leaves 8 |
| 17 | 489 ÷ 17 | leaves 13 |
| 19 | 489 ÷ 19 | leaves 14 |
Questions
Is 489 a prime number?
No, 489 is not a prime number. It is divisible by 3: 489 = 3 × 163.
What is the next prime after 489?
491.
What is the prime number before 489?
487.
What are the factors of 489?
1, 3, 163, 489.