The digital root of a natural number in a given radix is the value obtained by repeatedly summing its digits until a single digit remains. For example, in base ten the digital root of 12345 is 6, because 1 plus 2 plus 3 plus 4 plus 5 equals 15, and 1 plus 5 equals 6. In base ten this is equivalent to the remainder on division by 9, which is why the digital root can be used as a divisibility rule. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/
Facts
Connections
Is Kind Of Object
Entity-backed identity for the object-kind enum value this mathematical object already carries, resolved to a mathematics concept by an explicit value-to-entity map (phase 3 bucket conversion, docs\design_entity_backed_browse_buckets_20260928.md). The object-kind fact itself stays on the object unchanged.
Sources
1. Digital Root (Wikipedia)
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