Q: Is 172,017 a Prime Number?

A: No, 172,017 is not a prime number.

Why is 172,017 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 172017 can be evenly divided by 1 3 9 23 27 69 207 277 621 831 2,493 6,371 7,479 19,113 57,339 and 172,017, with no remainder.

Since 172,017 cannot be divided by just 1 and 172,017, it is not a prime number.

Number	172,015	172,016	172,018	172,019
Prime?	no	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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