102 is the smallest three digit number with different digits.
smallest 8 digit number with three different digits
638
102
102
100,002.
10002
All five digit numbers have three digits. The smallest five digit whole number is 10,000
How about 256
There are only two smaller 3-digit numbers and both of them have repeated digits.
1023456789
The smallest number that someone can get using the 91764 digits is 14679. The secret is to arrange the digits from the least number to their greatest number.