A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 735930 can be evenly divided by 1 2 3 5 6 9 10 13 15 17 18 26 30 34 37 39 45 51 65 74 78 85 90 102 111 117 130 153 170 185 195 221 222 234 255 306 333 370 390 442 481 510 555 585 629 663 666 765 962 1,105 1,110 1,170 1,258 1,326 1,443 1,530 1,665 1,887 1,989 2,210 2,405 2,886 3,145 3,315 3,330 3,774 3,978 4,329 4,810 5,661 6,290 6,630 7,215 8,177 8,658 9,435 9,945 11,322 14,430 16,354 18,870 19,890 21,645 24,531 28,305 40,885 43,290 49,062 56,610 73,593 81,770 122,655 147,186 245,310 367,965 and 735,930, with no remainder.
Since 735,930 cannot be divided by just 1 and 735,930, it is not a prime number.