Q: Is 641,579 a Prime Number?
A: Yes, 641,579 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 641579 can be evenly divided by 1 and 641,579, with no remainder.
Since 641,579 can be divided by just 1 and 641,579, it is a prime number.