Step 1: Divide the number into separate digits:
08837 => 0 8 8 3 7
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
0 to 8 = 8
8 to 8 = 0
8 to 3 = 5
3 to 7 = 4
7 to 0 = 7
Step 3: Combine the filters to a string:
8 0 5 4 7 = 80547