Q: Is 978,172 a Prime Number?

A: No, 978,172 is not a prime number.

Why is 978,172 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 978172 can be evenly divided by 1 2 4 13 26 52 169 338 676 1,447 2,894 5,788 18,811 37,622 75,244 244,543 489,086 and 978,172, with no remainder.

Since 978,172 cannot be divided by just 1 and 978,172, it is not a prime number.

Number	978,170	978,171	978,173	978,174
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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