A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4719330 can be evenly divided by 1 2 3 5 6 7 9 10 11 14 15 18 21 22 27 30 33 35 42 45 54 55 63 66 70 77 90 99 105 110 126 135 154 165 189 198 210 227 231 270 297 315 330 378 385 454 462 495 594 630 681 693 770 945 990 1,135 1,155 1,362 1,386 1,485 1,589 1,890 2,043 2,079 2,270 2,310 2,497 2,970 3,178 3,405 3,465 4,086 4,158 4,767 4,994 6,129 6,810 6,930 7,491 7,945 9,534 10,215 10,395 12,258 12,485 14,301 14,982 15,890 17,479 20,430 20,790 22,473 23,835 24,970 28,602 30,645 34,958 37,455 42,903 44,946 47,670 52,437 61,290 67,419 71,505 74,910 85,806 87,395 104,874 112,365 134,838 143,010 157,311 174,790 214,515 224,730 262,185 314,622 337,095 429,030 471,933 524,370 674,190 786,555 943,866 1,573,110 2,359,665 and 4,719,330, with no remainder.
Since 4,719,330 cannot be divided by just 1 and 4,719,330, it is not a prime number.