Q: Is 643,513 a Prime Number?
A: No, 643,513 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 643513 can be evenly divided by 1 13 59 767 839 10,907 49,501 and 643,513, with no remainder.
Since 643,513 cannot be divided by just 1 and 643,513, it is not a prime number.