A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5957208 can be evenly divided by 1 2 3 4 6 8 9 12 17 18 24 31 34 36 51 62 68 72 93 102 124 136 153 157 186 204 248 279 306 314 372 408 471 527 558 612 628 744 942 1,054 1,116 1,224 1,256 1,413 1,581 1,884 2,108 2,232 2,669 2,826 3,162 3,768 4,216 4,743 4,867 5,338 5,652 6,324 8,007 9,486 9,734 10,676 11,304 12,648 14,601 16,014 18,972 19,468 21,352 24,021 29,202 32,028 37,944 38,936 43,803 48,042 58,404 64,056 82,739 87,606 96,084 116,808 165,478 175,212 192,168 248,217 330,956 350,424 496,434 661,912 744,651 992,868 1,489,302 1,985,736 2,978,604 and 5,957,208, with no remainder.
Since 5,957,208 cannot be divided by just 1 and 5,957,208, it is not a prime number.