Your number, one digit away

One digit away

One digit, +28 points.

Your number

638,401

Exceptional · Top 2.28%

Best one-digit neighbour

637,401

Exceptional · Top 1.43%

Position 3: 8 → 7 · +28 points.

Gained: Binary palindrome, Digit sum 21, Semiprime.

Lost: Perfect square, Digit sum 22.

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