Q: Is 505,609 a Prime Number?
A: No, 505,609 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 505609 can be evenly divided by 1 13 19 23 89 247 299 437 1,157 1,691 2,047 5,681 21,983 26,611 38,893 and 505,609, with no remainder.
Since 505,609 cannot be divided by just 1 and 505,609, it is not a prime number.