Is 9990 a prime number?
No, 9990 is not a prime number. It is divisible by 2: 9990 = 2 × 4995.
Is 9990 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 √9990 ≈ 99.95. If none of them divides 9990, it is prime.
- 3
2 divides 9990 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 9990 = 2 \times 3^{3} \times 5 \times 37 \]Testing 9990 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 9990 ÷ 2 | divides exactly (4995) |
| 3 | 9990 ÷ 3 | divides exactly (3330) |
| 5 | 9990 ÷ 5 | divides exactly (1998) |
| 7 | 9990 ÷ 7 | leaves 1 |
| 11 | 9990 ÷ 11 | leaves 2 |
| 13 | 9990 ÷ 13 | leaves 6 |
| 17 | 9990 ÷ 17 | leaves 11 |
| 19 | 9990 ÷ 19 | leaves 15 |
| 23 | 9990 ÷ 23 | leaves 8 |
| 29 | 9990 ÷ 29 | leaves 14 |
| 31 | 9990 ÷ 31 | leaves 8 |
| 37 | 9990 ÷ 37 | divides exactly (270) |
Questions
Is 9990 a prime number?
No, 9990 is not a prime number. It is divisible by 2: 9990 = 2 × 4995.
What is the next prime after 9990?
10007.
What is the prime number before 9990?
9973.
What are the factors of 9990?
1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 37, 45, 54, 74, 90, 111, 135, 185, 222, 270, 333, 370, 555, 666, 999, 1110, 1665, 1998, 3330, 4995, 9990.