A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 9474948 can be evenly divided by 1 2 3 4 6 7 9 12 14 18 21 27 28 36 42 54 63 83 84 108 126 151 166 189 249 252 302 332 378 453 498 581 604 747 756 906 996 1,057 1,162 1,359 1,494 1,743 1,812 2,114 2,241 2,324 2,718 2,988 3,171 3,486 4,077 4,228 4,482 5,229 5,436 6,342 6,972 8,154 8,964 9,513 10,458 12,533 12,684 15,687 16,308 19,026 20,916 25,066 28,539 31,374 37,599 38,052 50,132 57,078 62,748 75,198 87,731 112,797 114,156 150,396 175,462 225,594 263,193 338,391 350,924 451,188 526,386 676,782 789,579 1,052,772 1,353,564 1,579,158 2,368,737 3,158,316 4,737,474 and 9,474,948, with no remainder.
Since 9,474,948 cannot be divided by just 1 and 9,474,948, it is not a prime number.