Q: Is 4,391 a Prime Number?

A: Yes, 4,391 is a prime number.

Why is 4,391 a prime number?

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

The number 4391 can be evenly divided by 1 and 4,391, with no remainder.

Since 4,391 can be divided by just 1 and 4,391, it is a prime number.

Number	4,389	4,390	4,392	4,393
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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