Q: Is 400,007 a Prime Number?
A: No, 400,007 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 400007 can be evenly divided by 1 19 37 569 703 10,811 21,053 and 400,007, with no remainder.
Since 400,007 cannot be divided by just 1 and 400,007, it is not a prime number.