Q: Is 61,509 a Prime Number?
A: No, 61,509 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 61509 can be evenly divided by 1 3 7 21 29 87 101 203 303 609 707 2,121 2,929 8,787 20,503 and 61,509, with no remainder.
Since 61,509 cannot be divided by just 1 and 61,509, it is not a prime number.