Step 1: Divide the number into separate digits:
69429 => 6 9 4 2 9
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
6 to 9 = 3
9 to 4 = 5
4 to 2 = 2
2 to 9 = 7
9 to 6 = 3
Step 3: Combine the filters to a string:
3 5 2 7 3 = 35273