9 if you mean only a single digit
9 and 99
99 + 9 = 108
9870
The largest one digit number that has three factors is 9. Its factors are 1, 3, and 9.
9
It is 9999 (if a one is added, it becomes a five digit number: 9999 + 1 = 10,000)
The possibilities are all the counting numbers from the largest 16-digit one to the largest 17-digit one.99,999,999,999,999,999 minus 9,999,999,999,999,999 = 90,000,000,000,000,000
There can only be one largest two-digit prime number.
Unless this is a trick question 9995 would be the largest 4 digit number with 5 as one of its digits
The largest six-digit number is 999,999. It is the highest value that can be represented with six digits, where each digit is at its maximum of 9. This number is one less than one million, which is the smallest seven-digit number.
9
9.....??