A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5193804 can be evenly divided by 1 2 3 4 6 7 11 12 14 21 22 28 33 42 44 49 66 73 77 84 98 121 132 146 147 154 196 219 231 242 292 294 308 363 438 462 484 511 539 588 726 803 847 876 924 1,022 1,078 1,452 1,533 1,606 1,617 1,694 2,044 2,156 2,409 2,541 3,066 3,212 3,234 3,388 3,577 4,818 5,082 5,621 5,929 6,132 6,468 7,154 8,833 9,636 10,164 10,731 11,242 11,858 14,308 16,863 17,666 17,787 21,462 22,484 23,716 26,499 33,726 35,332 35,574 39,347 42,924 52,998 61,831 67,452 71,148 78,694 105,996 118,041 123,662 157,388 185,493 236,082 247,324 370,986 432,817 472,164 741,972 865,634 1,298,451 1,731,268 2,596,902 and 5,193,804, with no remainder.
Since 5,193,804 cannot be divided by just 1 and 5,193,804, it is not a prime number.