Q: Is 643,023 a Prime Number?
A: No, 643,023 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 643023 can be evenly divided by 1 3 9 37 111 333 1,931 5,793 17,379 71,447 214,341 and 643,023, with no remainder.
Since 643,023 cannot be divided by just 1 and 643,023, it is not a prime number.