Q: Is 643,469 a Prime Number?
A: Yes, 643,469 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 643469 can be evenly divided by 1 and 643,469, with no remainder.
Since 643,469 can be divided by just 1 and 643,469, it is a prime number.