Q: Is 671,859 a Prime Number?
A: No, 671,859 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 671859 can be evenly divided by 1 3 9 19 57 171 3,929 11,787 35,361 74,651 223,953 and 671,859, with no remainder.
Since 671,859 cannot be divided by just 1 and 671,859, it is not a prime number.