Q: Is 71,991 a Prime Number?
A: No, 71,991 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 71991 can be evenly divided by 1 3 9 19 57 171 421 1,263 3,789 7,999 23,997 and 71,991, with no remainder.
Since 71,991 cannot be divided by just 1 and 71,991, it is not a prime number.