Q: Is 787,664 a Prime Number?
A: No, 787,664 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 787664 can be evenly divided by 1 2 4 8 16 19 38 76 152 304 2,591 5,182 10,364 20,728 41,456 49,229 98,458 196,916 393,832 and 787,664, with no remainder.
Since 787,664 cannot be divided by just 1 and 787,664, it is not a prime number.