Q: Is 561,809 a Prime Number?
A: Yes, 561,809 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 561809 can be evenly divided by 1 and 561,809, with no remainder.
Since 561,809 can be divided by just 1 and 561,809, it is a prime number.