999 (assuming base ten mathematics)
999.
If you are allowed to use indices, then 9^(9^9) would be the largest. This equates to a very, very, VERY long number.
999 by regular definition. 9 to the power of 9 to the power of 9, is another.
999 is the largest 3-digit number.
997 is the largest 3-digit prime.
997 is the largest 3-digit Prime number.
997 is the largest 3-digit prime number.
Largest 4 digit number with repetition is 9999 Largest 3 digit number without repetition is 987 Difference is 9999 - 987 = 9012.
0
The largest 3-digit number in base 3 is 222. Its decimal equivalent is 26
The largest 3-digit odd number is 999.
The largest 3 digit number whose digits are all primes is 777. The largest 3 digit number with different prime digits is 753.
Largest 4 digit number = 9999 Smallest 3 digit number = 111 9999 - 111 = 9888 Largest 4 digit number = 9999 Smallest 3 digit number = 111 9999 - 111 = 9888
9000
The largest number with three digits is 999.