Q: Is 5,643 a Prime Number?

A: No, 5,643 is not a prime number.

Why is 5,643 not a prime number?

A prime number is a natural number, greater than one, that can only be divided by 1 and itself.

The number 5643 can be evenly divided by 1 3 9 11 19 27 33 57 99 171 209 297 513 627 1,881 and 5,643, with no remainder.

Since 5,643 cannot be divided by just 1 and 5,643, it is not a prime number.

Number	5,641	5,642	5,644	5,645
Prime?	yes	no	no	no

All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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