A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 7068384 can be evenly divided by 1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 72 81 96 101 108 144 162 202 216 243 288 303 324 404 432 486 606 648 729 808 864 909 972 1,212 1,296 1,458 1,616 1,818 1,944 2,187 2,424 2,592 2,727 2,916 3,232 3,636 3,888 4,374 4,848 5,454 5,832 7,272 7,776 8,181 8,748 9,696 10,908 11,664 14,544 16,362 17,496 21,816 23,328 24,543 29,088 32,724 34,992 43,632 49,086 65,448 69,984 73,629 87,264 98,172 130,896 147,258 196,344 220,887 261,792 294,516 392,688 441,774 589,032 785,376 883,548 1,178,064 1,767,096 2,356,128 3,534,192 and 7,068,384, with no remainder.
Since 7,068,384 cannot be divided by just 1 and 7,068,384, it is not a prime number.