Q: Is 643,004 a Prime Number?
A: No, 643,004 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 643004 can be evenly divided by 1 2 4 160,751 321,502 and 643,004, with no remainder.
Since 643,004 cannot be divided by just 1 and 643,004, it is not a prime number.