Q: Is 643,223 a Prime Number?
A: No, 643,223 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 643223 can be evenly divided by 1 7 49 13,127 91,889 and 643,223, with no remainder.
Since 643,223 cannot be divided by just 1 and 643,223, it is not a prime number.