A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3710700 can be evenly divided by 1 2 3 4 5 6 7 9 10 12 14 15 18 19 20 21 25 28 30 31 35 36 38 42 45 50 57 60 62 63 70 75 76 84 90 93 95 100 105 114 124 126 133 140 150 155 171 175 180 186 190 210 217 225 228 252 266 279 285 300 310 315 342 350 372 380 399 420 434 450 465 475 525 532 558 570 589 620 630 651 665 684 700 775 798 855 868 900 930 950 1,050 1,085 1,116 1,140 1,178 1,197 1,260 1,302 1,330 1,395 1,425 1,550 1,575 1,596 1,710 1,767 1,860 1,900 1,953 1,995 2,100 2,170 2,325 2,356 2,394 2,604 2,660 2,790 2,850 2,945 3,100 3,150 3,255 3,325 3,420 3,534 3,906 3,990 4,123 4,275 4,340 4,650 4,788 5,301 5,425 5,580 5,700 5,890 5,985 6,300 6,510 6,650 6,975 7,068 7,812 7,980 8,246 8,550 8,835 9,300 9,765 9,975 10,602 10,850 11,780 11,970 12,369 13,020 13,300 13,950 14,725 16,275 16,492 17,100 17,670 19,530 19,950 20,615 21,204 21,700 23,940 24,738 26,505 27,900 29,450 29,925 32,550 35,340 37,107 39,060 39,900 41,230 44,175 48,825 49,476 53,010 58,900 59,850 61,845 65,100 74,214 82,460 88,350 97,650 103,075 106,020 119,700 123,690 132,525 148,428 176,700 185,535 195,300 206,150 247,380 265,050 309,225 371,070 412,300 530,100 618,450 742,140 927,675 1,236,900 1,855,350 and 3,710,700, with no remainder.
Since 3,710,700 cannot be divided by just 1 and 3,710,700, it is not a prime number.