899991
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99990 ----------------------------------------------------------------------------------------------- Largest 5 digit number is 99999 99999 ÷ 99 = 1010 r 9 → largest 5 digit number divisible by 99 is 99 x 1010 = 99990
100*99999 = 9999900100*99999 = 9999900100*99999 = 9999900100*99999 = 9999900
A number is divisible by 9 if the sum of its digits is divisible by 9. Thus, the number 99999 is divisible by 9 (the sum of its digits is 45, and it is clearly 11111 * 9), and because 99999 is the largest 5 digit number, it must be the largest 5 digit multiple of 9. 99999 is the greatest no divisible by 9.if u divide it u`ll get 11111.
The largest 5-digit number divisible exactly by 99 is 99990.
1, 3, 9, 41, 123, 271, 369, 813, 2439, 11111, 33333, 99999 3, 41 and 271 are prime.