Q: Is 643,073 a Prime Number?
A: Yes, 643,073 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 643073 can be evenly divided by 1 and 643,073, with no remainder.
Since 643,073 can be divided by just 1 and 643,073, it is a prime number.