A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8317782 can be evenly divided by 1 2 3 6 9 11 18 19 22 27 33 38 54 57 66 67 99 114 121 134 171 198 201 209 242 297 342 363 402 418 513 594 603 627 726 737 1,026 1,089 1,206 1,254 1,273 1,474 1,809 1,881 2,178 2,211 2,299 2,546 3,267 3,618 3,762 3,819 4,422 4,598 5,643 6,534 6,633 6,897 7,638 8,107 11,286 11,457 13,266 13,794 14,003 16,214 19,899 20,691 22,914 24,321 28,006 34,371 39,798 41,382 42,009 48,642 62,073 68,742 72,963 84,018 124,146 126,027 145,926 154,033 218,889 252,054 308,066 378,081 437,778 462,099 756,162 924,198 1,386,297 2,772,594 4,158,891 and 8,317,782, with no remainder.
Since 8,317,782 cannot be divided by just 1 and 8,317,782, it is not a prime number.