Q: Is 859,991 a Prime Number?
A: No, 859,991 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 859991 can be evenly divided by 1 11 37 407 2,113 23,243 78,181 and 859,991, with no remainder.
Since 859,991 cannot be divided by just 1 and 859,991, it is not a prime number.