Q: Is 3,640,639 a Prime Number?
A: No, 3,640,639 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 3640639 can be evenly divided by 1 1,171 3,109 and 3,640,639, with no remainder.
Since 3,640,639 cannot be divided by just 1 and 3,640,639, it is not a prime number.