To determine if 1647 is a prime number or a composite number, we simply look at the factors for 1647.
If the factors of 1647 are only 1647 and 1, then we know that 1647 is a prime number. Otherwise, 1647 is a composite number.
To explain better, if 1647 is only divisible by 1 and 1647, then it is a prime number, and if 1647 is divisible by more than 1647 and 1, then it is a composite number.
The factors of 1647 are as follows:
1, 3, 9, 27, 61, 183, 549, 1647
Therefore, since 1647 is divisible by more than one and itself, the answer to the
question "Is 1647 prime or composite?" is highlighted in blue below.
composite
Is 1648 prime or composite?
OK. Now you know that 1647 is a composite number. Use our logic above and see if
you can figure out if the next number on our list is prime or composite before you check your answer.
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