Q: Is 640,850 a Prime Number?
A: No, 640,850 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 640850 can be evenly divided by 1 2 5 7 10 14 25 35 50 70 175 350 1,831 3,662 9,155 12,817 18,310 25,634 45,775 64,085 91,550 128,170 320,425 and 640,850, with no remainder.
Since 640,850 cannot be divided by just 1 and 640,850, it is not a prime number.