9999
5
9,999
The biggest 4 digit number that can be made from using the digits of 850236, using a digit at most once, is 8653.
9999
9,999
992 = 9,801
7532
9909
997 is the biggest 3 digit Prime number.
997 is the biggest 3 digit prime number.
998 is the biggest 3-digit even number
9999