Q: Is 679,640 a Prime Number?
A: No, 679,640 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 679640 can be evenly divided by 1 2 4 5 8 10 13 20 26 40 52 65 104 130 260 520 1,307 2,614 5,228 6,535 10,456 13,070 16,991 26,140 33,982 52,280 67,964 84,955 135,928 169,910 339,820 and 679,640, with no remainder.
Since 679,640 cannot be divided by just 1 and 679,640, it is not a prime number.