Q: Is 671,688 a Prime Number?
A: No, 671,688 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 671688 can be evenly divided by 1 2 3 4 6 8 9 12 18 19 24 36 38 57 72 76 114 152 171 228 342 456 491 684 982 1,368 1,473 1,964 2,946 3,928 4,419 5,892 8,838 9,329 11,784 17,676 18,658 27,987 35,352 37,316 55,974 74,632 83,961 111,948 167,922 223,896 335,844 and 671,688, with no remainder.
Since 671,688 cannot be divided by just 1 and 671,688, it is not a prime number.