Q: Is 671,823 a Prime Number?
A: No, 671,823 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 671823 can be evenly divided by 1 3 9 17 51 153 4,391 13,173 39,519 74,647 223,941 and 671,823, with no remainder.
Since 671,823 cannot be divided by just 1 and 671,823, it is not a prime number.