Q: Is 400,879 a Prime Number?
A: No, 400,879 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 400879 can be evenly divided by 1 311 1,289 and 400,879, with no remainder.
Since 400,879 cannot be divided by just 1 and 400,879, it is not a prime number.