Q: Is 691,615 a Prime Number?
A: No, 691,615 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 691615 can be evenly divided by 1 5 138,323 and 691,615, with no remainder.
Since 691,615 cannot be divided by just 1 and 691,615, it is not a prime number.