A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4684792 can be evenly divided by 1 2 4 7 8 14 17 19 28 34 37 38 49 56 68 74 76 98 119 133 136 148 152 196 238 259 266 296 323 392 476 518 532 629 646 703 833 931 952 1,036 1,064 1,258 1,292 1,406 1,666 1,813 1,862 2,072 2,261 2,516 2,584 2,812 3,332 3,626 3,724 4,403 4,522 4,921 5,032 5,624 6,664 7,252 7,448 8,806 9,044 9,842 11,951 14,504 15,827 17,612 18,088 19,684 23,902 30,821 31,654 34,447 35,224 39,368 47,804 61,642 63,308 68,894 83,657 95,608 123,284 126,616 137,788 167,314 246,568 275,576 334,628 585,599 669,256 1,171,198 2,342,396 and 4,684,792, with no remainder.
Since 4,684,792 cannot be divided by just 1 and 4,684,792, it is not a prime number.