Q: Is 609,375 a Prime Number?
A: No, 609,375 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 609375 can be evenly divided by 1 3 5 13 15 25 39 65 75 125 195 325 375 625 975 1,625 1,875 3,125 4,875 8,125 9,375 15,625 24,375 40,625 46,875 121,875 203,125 and 609,375, with no remainder.
Since 609,375 cannot be divided by just 1 and 609,375, it is not a prime number.