A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 9193536 can be evenly divided by 1 2 3 4 6 8 9 11 12 16 18 22 24 32 33 36 44 48 64 66 72 88 96 99 132 144 176 192 198 264 288 352 396 528 576 704 792 1,056 1,451 1,584 2,112 2,902 3,168 4,353 5,804 6,336 8,706 11,608 13,059 15,961 17,412 23,216 26,118 31,922 34,824 46,432 47,883 52,236 63,844 69,648 92,864 95,766 104,472 127,688 139,296 143,649 191,532 208,944 255,376 278,592 287,298 383,064 417,888 510,752 574,596 766,128 835,776 1,021,504 1,149,192 1,532,256 2,298,384 3,064,512 4,596,768 and 9,193,536, with no remainder.
Since 9,193,536 cannot be divided by just 1 and 9,193,536, it is not a prime number.