Q: Is 138,403 a Prime Number?
A: Yes, 138,403 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 138403 can be evenly divided by 1 and 138,403, with no remainder.
Since 138,403 can be divided by just 1 and 138,403, it is a prime number.