Q: Is 387,921 a Prime Number?
A: No, 387,921 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 387921 can be evenly divided by 1 3 191 573 677 2,031 129,307 and 387,921, with no remainder.
Since 387,921 cannot be divided by just 1 and 387,921, it is not a prime number.