Q: Is 997,640 a Prime Number?
A: No, 997,640 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 997640 can be evenly divided by 1 2 4 5 7 8 10 14 20 28 35 40 49 56 70 98 140 196 245 280 392 490 509 980 1,018 1,960 2,036 2,545 3,563 4,072 5,090 7,126 10,180 14,252 17,815 20,360 24,941 28,504 35,630 49,882 71,260 99,764 124,705 142,520 199,528 249,410 498,820 and 997,640, with no remainder.
Since 997,640 cannot be divided by just 1 and 997,640, it is not a prime number.