A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8979552 can be evenly divided by 1 2 3 4 6 8 9 12 16 18 19 24 27 32 36 38 48 54 57 72 76 96 108 114 144 152 171 216 228 288 304 342 432 456 513 547 608 684 864 912 1,026 1,094 1,368 1,641 1,824 2,052 2,188 2,736 3,282 4,104 4,376 4,923 5,472 6,564 8,208 8,752 9,846 10,393 13,128 14,769 16,416 17,504 19,692 20,786 26,256 29,538 31,179 39,384 41,572 52,512 59,076 62,358 78,768 83,144 93,537 118,152 124,716 157,536 166,288 187,074 236,304 249,432 280,611 332,576 374,148 472,608 498,864 561,222 748,296 997,728 1,122,444 1,496,592 2,244,888 2,993,184 4,489,776 and 8,979,552, with no remainder.
Since 8,979,552 cannot be divided by just 1 and 8,979,552, it is not a prime number.