Q: Is 3,621,609 a Prime Number?
A: No, 3,621,609 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 3621609 can be evenly divided by 1 3 9 19 57 171 21,179 63,537 190,611 402,401 1,207,203 and 3,621,609, with no remainder.
Since 3,621,609 cannot be divided by just 1 and 3,621,609, it is not a prime number.