Your number, one digit away

One digit away

One digit, +31 points.

Position 3: 6 → 7 · +31 points.

Gained: Digit sum 29, Alternating parity, Happy number.

Lost: Digit sum 28, Harshad number.

53 legal neighbours · same digit length · no leading zeros. This describes an alternative number, not the odds of your next roll.