Q: Is 4,000,409 a Prime Number?
A: No, 4,000,409 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 4000409 can be evenly divided by 1 7 49 107 109 343 749 763 5,243 5,341 11,663 36,701 37,387 81,641 571,487 and 4,000,409, with no remainder.
Since 4,000,409 cannot be divided by just 1 and 4,000,409, it is not a prime number.