A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 9476940 can be evenly divided by 1 2 3 4 5 6 10 11 12 15 20 22 30 33 44 55 60 66 83 110 132 165 166 173 220 249 330 332 346 415 498 519 660 692 830 865 913 996 1,038 1,245 1,660 1,730 1,826 1,903 2,076 2,490 2,595 2,739 3,460 3,652 3,806 4,565 4,980 5,190 5,478 5,709 7,612 9,130 9,515 10,380 10,956 11,418 13,695 14,359 18,260 19,030 22,836 27,390 28,545 28,718 38,060 43,077 54,780 57,090 57,436 71,795 86,154 114,180 143,590 157,949 172,308 215,385 287,180 315,898 430,770 473,847 631,796 789,745 861,540 947,694 1,579,490 1,895,388 2,369,235 3,158,980 4,738,470 and 9,476,940, with no remainder.
Since 9,476,940 cannot be divided by just 1 and 9,476,940, it is not a prime number.