Is 27 a prime number?
No, 27 is not a prime number. It is divisible by 3: 27 = 3 × 9.
Is 27 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 √27 ≈ 5.20. If none of them divides 27, it is prime.
- 3
3 divides 27 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 27 = 3^{3} \]Testing 27 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 27 ÷ 2 | leaves 1 |
| 3 | 27 ÷ 3 | divides exactly (9) |
| 5 | 27 ÷ 5 | leaves 2 |
Questions
Is 27 a prime number?
No, 27 is not a prime number. It is divisible by 3: 27 = 3 × 9.
What is the next prime after 27?
29.
What is the prime number before 27?
23.
What are the factors of 27?
1, 3, 9, 27.