A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 9290772 can be evenly divided by 1 2 3 4 6 9 12 17 18 19 34 36 38 47 51 57 68 76 94 102 114 141 153 171 188 204 228 282 289 306 323 342 423 564 578 612 646 684 799 846 867 893 969 1,156 1,292 1,598 1,692 1,734 1,786 1,938 2,397 2,601 2,679 2,907 3,196 3,468 3,572 3,876 4,794 5,202 5,358 5,491 5,814 7,191 8,037 9,588 10,404 10,716 10,982 11,628 13,583 14,382 15,181 16,074 16,473 21,964 27,166 28,764 30,362 32,148 32,946 40,749 45,543 49,419 54,332 60,724 65,892 81,498 91,086 98,838 122,247 136,629 162,996 182,172 197,676 244,494 258,077 273,258 488,988 516,154 546,516 774,231 1,032,308 1,548,462 2,322,693 3,096,924 4,645,386 and 9,290,772, with no remainder.
Since 9,290,772 cannot be divided by just 1 and 9,290,772, it is not a prime number.