Q: Is 138,391 a Prime Number?
A: No, 138,391 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 138391 can be evenly divided by 1 11 23 253 547 6,017 12,581 and 138,391, with no remainder.
Since 138,391 cannot be divided by just 1 and 138,391, it is not a prime number.