Step 1: Divide the number into separate digits:
73463 => 7 3 4 6 3
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
7 to 3 = 4
3 to 4 = 1
4 to 6 = 2
6 to 3 = 3
3 to 7 = 4
Step 3: Combine the filters to a string:
4 1 2 3 4 = 41234