A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3473610 can be evenly divided by 1 2 3 5 6 7 10 14 15 17 21 30 34 35 42 49 51 70 85 98 102 105 119 139 147 170 210 238 245 255 278 294 357 417 490 510 595 695 714 735 833 834 973 1,190 1,390 1,470 1,666 1,785 1,946 2,085 2,363 2,499 2,919 3,570 4,165 4,170 4,726 4,865 4,998 5,838 6,811 7,089 8,330 9,730 11,815 12,495 13,622 14,178 14,595 16,541 20,433 23,630 24,990 29,190 33,082 34,055 35,445 40,866 49,623 68,110 70,890 82,705 99,246 102,165 115,787 165,410 204,330 231,574 248,115 347,361 496,230 578,935 694,722 1,157,870 1,736,805 and 3,473,610, with no remainder.
Since 3,473,610 cannot be divided by just 1 and 3,473,610, it is not a prime number.