Q: Is 691,604 a Prime Number?
A: No, 691,604 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 691604 can be evenly divided by 1 2 4 37 74 148 4,673 9,346 18,692 172,901 345,802 and 691,604, with no remainder.
Since 691,604 cannot be divided by just 1 and 691,604, it is not a prime number.