987654321
10234567
4321
There are twelve possible solutions using the rule you stated.
98765432
987654321
10234567
9,876,543
4321
There are twelve possible solutions using the rule you stated.
98765432
The smallest possible 9 digit number (assuming negatives are not allowed) is 102,345,678 in which 5 is in the thousands' place.
123,456,789
9876543
9876543
It is 98765.
The least possible integer is -98765432. The least possible positive integer is 10234567.