Q: Is 428,009 a Prime Number?

A: No, 428,009 is not a prime number.

Why is 428,009 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 428009 can be evenly divided by 1 17 289 1,481 25,177 and 428,009, with no remainder.

Since 428,009 cannot be divided by just 1 and 428,009, it is not a prime number.

Number	428,007	428,008	428,010	428,011
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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