Q: Is 722,639 a Prime Number?
A: Yes, 722,639 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 722639 can be evenly divided by 1 and 722,639, with no remainder.
Since 722,639 can be divided by just 1 and 722,639, it is a prime number.