Q: Is 209,805 a Prime Number?
A: No, 209,805 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 209805 can be evenly divided by 1 3 5 15 71 197 213 355 591 985 1,065 2,955 13,987 41,961 69,935 and 209,805, with no remainder.
Since 209,805 cannot be divided by just 1 and 209,805, it is not a prime number.