Q: Is 677,639 a Prime Number?
A: Yes, 677,639 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 677639 can be evenly divided by 1 and 677,639, with no remainder.
Since 677,639 can be divided by just 1 and 677,639, it is a prime number.