Your number, one digit away
One digit away
One change could reach Singular.
Your number
1,639
Exceptional · Top 1.53%
Position 4: 9 → 8 · +324 points.
Gained: Hex repdigit, Digit sum 18, Alternating parity, Harshad number.
Lost: Digit sum 19, Semiprime.
35 legal neighbours · same digit length · no leading zeros. This describes an alternative number, not the odds of your next roll.