A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6190470 can be evenly divided by 1 2 3 5 6 9 10 11 13 15 18 22 26 30 33 37 39 45 55 65 66 74 78 90 99 110 111 117 130 143 165 169 185 195 198 222 234 286 330 333 338 370 390 407 429 481 495 507 555 585 666 715 814 845 858 962 990 1,014 1,110 1,170 1,221 1,287 1,430 1,443 1,521 1,665 1,690 1,859 2,035 2,145 2,405 2,442 2,535 2,574 2,886 3,042 3,330 3,663 3,718 4,070 4,290 4,329 4,810 5,070 5,291 5,577 6,105 6,253 6,435 7,215 7,326 7,605 8,658 9,295 10,582 11,154 12,210 12,506 12,870 14,430 15,210 15,873 16,731 18,315 18,590 18,759 21,645 26,455 27,885 31,265 31,746 33,462 36,630 37,518 43,290 47,619 52,910 55,770 56,277 62,530 68,783 79,365 83,655 93,795 95,238 112,554 137,566 158,730 167,310 187,590 206,349 238,095 281,385 343,915 412,698 476,190 562,770 619,047 687,830 1,031,745 1,238,094 2,063,490 3,095,235 and 6,190,470, with no remainder.
Since 6,190,470 cannot be divided by just 1 and 6,190,470, it is not a prime number.