Is 9987 a prime number?
No, 9987 is not a prime number. It is divisible by 3: 9987 = 3 × 3329.
Is 9987 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 √9987 ≈ 99.93. If none of them divides 9987, it is prime.
- 3
3 divides 9987 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 9987 = 3 \times 3329 \]
Testing 9987 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 9987 ÷ 2 | leaves 1 |
| 3 | 9987 ÷ 3 | divides exactly (3329) |
| 5 | 9987 ÷ 5 | leaves 2 |
| 7 | 9987 ÷ 7 | leaves 5 |
| 11 | 9987 ÷ 11 | leaves 10 |
| 13 | 9987 ÷ 13 | leaves 3 |
| 17 | 9987 ÷ 17 | leaves 8 |
| 19 | 9987 ÷ 19 | leaves 12 |
| 23 | 9987 ÷ 23 | leaves 5 |
| 29 | 9987 ÷ 29 | leaves 11 |
| 31 | 9987 ÷ 31 | leaves 5 |
| 37 | 9987 ÷ 37 | leaves 34 |
Questions
Is 9987 a prime number?
No, 9987 is not a prime number. It is divisible by 3: 9987 = 3 × 3329.
What is the next prime after 9987?
10007.
What is the prime number before 9987?
9973.
What are the factors of 9987?
1, 3, 3329, 9987.