Q: Is 561,691 a Prime Number?
A: No, 561,691 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 561691 can be evenly divided by 1 13 43,207 and 561,691, with no remainder.
Since 561,691 cannot be divided by just 1 and 561,691, it is not a prime number.