Q: Is 263,991 a Prime Number?
A: No, 263,991 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 263991 can be evenly divided by 1 3 7 13 21 39 91 273 967 2,901 6,769 12,571 20,307 37,713 87,997 and 263,991, with no remainder.
Since 263,991 cannot be divided by just 1 and 263,991, it is not a prime number.