Q: Is 691,221 a Prime Number?
A: No, 691,221 is 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 691221 can be evenly divided by 1 3 113 339 2,039 6,117 230,407 and 691,221, with no remainder.
Since 691,221 cannot be divided by just 1 and 691,221, it is not a prime number.