A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8979000 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 20 24 25 30 40 41 50 60 73 75 82 100 120 123 125 146 150 164 200 205 219 246 250 292 300 328 365 375 410 438 492 500 584 600 615 730 750 820 876 984 1,000 1,025 1,095 1,230 1,460 1,500 1,640 1,752 1,825 2,050 2,190 2,460 2,920 2,993 3,000 3,075 3,650 4,100 4,380 4,920 5,125 5,475 5,986 6,150 7,300 8,200 8,760 8,979 9,125 10,250 10,950 11,972 12,300 14,600 14,965 15,375 17,958 18,250 20,500 21,900 23,944 24,600 27,375 29,930 30,750 35,916 36,500 41,000 43,800 44,895 54,750 59,860 61,500 71,832 73,000 74,825 89,790 109,500 119,720 123,000 149,650 179,580 219,000 224,475 299,300 359,160 374,125 448,950 598,600 748,250 897,900 1,122,375 1,496,500 1,795,800 2,244,750 2,993,000 4,489,500 and 8,979,000, with no remainder.
Since 8,979,000 cannot be divided by just 1 and 8,979,000, it is not a prime number.