Q: Is 640,790 a Prime Number?
A: No, 640,790 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 640790 can be evenly divided by 1 2 5 10 139 278 461 695 922 1,390 2,305 4,610 64,079 128,158 320,395 and 640,790, with no remainder.
Since 640,790 cannot be divided by just 1 and 640,790, it is not a prime number.