Q: Is 278,859 a Prime Number?
A: No, 278,859 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 278859 can be evenly divided by 1 3 7 21 49 147 271 343 813 1,029 1,897 5,691 13,279 39,837 92,953 and 278,859, with no remainder.
Since 278,859 cannot be divided by just 1 and 278,859, it is not a prime number.