A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1793160 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 17 18 20 24 30 34 36 40 45 51 60 68 72 85 90 102 120 136 153 170 180 204 255 293 306 340 360 408 510 586 612 680 765 879 1,020 1,172 1,224 1,465 1,530 1,758 2,040 2,344 2,637 2,930 3,060 3,516 4,395 4,981 5,274 5,860 6,120 7,032 8,790 9,962 10,548 11,720 13,185 14,943 17,580 19,924 21,096 24,905 26,370 29,886 35,160 39,848 44,829 49,810 52,740 59,772 74,715 89,658 99,620 105,480 119,544 149,430 179,316 199,240 224,145 298,860 358,632 448,290 597,720 896,580 and 1,793,160, with no remainder.
Since 1,793,160 cannot be divided by just 1 and 1,793,160, it is not a prime number.