A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 7189350 can be evenly divided by 1 2 3 5 6 7 10 14 15 21 25 30 35 41 42 50 70 75 82 105 123 150 167 175 205 210 246 287 334 350 410 501 525 574 615 835 861 1,002 1,025 1,050 1,169 1,230 1,435 1,670 1,722 2,050 2,338 2,505 2,870 3,075 3,507 4,175 4,305 5,010 5,845 6,150 6,847 7,014 7,175 8,350 8,610 11,690 12,525 13,694 14,350 17,535 20,541 21,525 25,050 29,225 34,235 35,070 41,082 43,050 47,929 58,450 68,470 87,675 95,858 102,705 143,787 171,175 175,350 205,410 239,645 287,574 342,350 479,290 513,525 718,935 1,027,050 1,198,225 1,437,870 2,396,450 3,594,675 and 7,189,350, with no remainder.
Since 7,189,350 cannot be divided by just 1 and 7,189,350, it is not a prime number.