A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3073950 can be evenly divided by 1 2 3 5 6 9 10 11 15 18 22 23 25 27 30 33 45 46 50 54 55 66 69 75 81 90 99 110 115 135 138 150 162 165 198 207 225 230 243 253 270 275 297 330 345 405 414 450 486 495 506 550 575 594 621 675 690 759 810 825 891 990 1,035 1,150 1,215 1,242 1,265 1,350 1,485 1,518 1,650 1,725 1,782 1,863 2,025 2,070 2,277 2,430 2,475 2,530 2,673 2,970 3,105 3,450 3,726 3,795 4,050 4,455 4,554 4,950 5,175 5,346 5,589 6,075 6,210 6,325 6,831 7,425 7,590 8,910 9,315 10,350 11,178 11,385 12,150 12,650 13,365 13,662 14,850 15,525 18,630 18,975 20,493 22,275 22,770 26,730 27,945 31,050 34,155 37,950 40,986 44,550 46,575 55,890 56,925 61,479 66,825 68,310 93,150 102,465 113,850 122,958 133,650 139,725 170,775 204,930 279,450 307,395 341,550 512,325 614,790 1,024,650 1,536,975 and 3,073,950, with no remainder.
Since 3,073,950 cannot be divided by just 1 and 3,073,950, it is not a prime number.