A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8994888 can be evenly divided by 1 2 3 4 6 7 8 9 12 14 18 21 24 27 28 36 42 54 56 63 72 81 84 108 126 162 168 189 216 243 252 324 378 486 504 567 648 661 756 972 1,134 1,322 1,512 1,701 1,944 1,983 2,268 2,644 3,402 3,966 4,536 4,627 5,288 5,949 6,804 7,932 9,254 11,898 13,608 13,881 15,864 17,847 18,508 23,796 27,762 35,694 37,016 41,643 47,592 53,541 55,524 71,388 83,286 107,082 111,048 124,929 142,776 160,623 166,572 214,164 249,858 321,246 333,144 374,787 428,328 499,716 642,492 749,574 999,432 1,124,361 1,284,984 1,499,148 2,248,722 2,998,296 4,497,444 and 8,994,888, with no remainder.
Since 8,994,888 cannot be divided by just 1 and 8,994,888, it is not a prime number.