Q: Is 18,189 a Prime Number?

A: No, 18,189 is not a prime number.

Why is 18,189 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 18189 can be evenly divided by 1 3 9 43 47 129 141 387 423 2,021 6,063 and 18,189, with no remainder.

Since 18,189 cannot be divided by just 1 and 18,189, it is not a prime number.

Number	18,187	18,188	18,190	18,191
Prime?	no	no	no	yes

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

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