Q: Is 402,403 a Prime Number?
A: Yes, 402,403 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 402403 can be evenly divided by 1 and 402,403, with no remainder.
Since 402,403 can be divided by just 1 and 402,403, it is a prime number.