Step 1: Divide the number into separate digits:
89923 => 8 9 9 2 3
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
8 to 9 = 1
9 to 9 = 0
9 to 2 = 7
2 to 3 = 1
3 to 8 = 5
Step 3: Combine the filters to a string:
1 0 7 1 5 = 10715