Q: Is 400,387 a Prime Number?
A: No, 400,387 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 400387 can be evenly divided by 1 13 19 247 1,621 21,073 30,799 and 400,387, with no remainder.
Since 400,387 cannot be divided by just 1 and 400,387, it is not a prime number.