Q: Is 279,740 a Prime Number?
A: No, 279,740 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 279740 can be evenly divided by 1 2 4 5 10 20 71 142 197 284 355 394 710 788 985 1,420 1,970 3,940 13,987 27,974 55,948 69,935 139,870 and 279,740, with no remainder.
Since 279,740 cannot be divided by just 1 and 279,740, it is not a prime number.