Q: Is 646,523 a Prime Number?
A: Yes, 646,523 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 646523 can be evenly divided by 1 and 646,523, with no remainder.
Since 646,523 can be divided by just 1 and 646,523, it is a prime number.