Q: Is 387,429 a Prime Number?
A: No, 387,429 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 387429 can be evenly divided by 1 3 7 19 21 57 133 399 971 2,913 6,797 18,449 20,391 55,347 129,143 and 387,429, with no remainder.
Since 387,429 cannot be divided by just 1 and 387,429, it is not a prime number.