single-digit remains, which is called the multiplicative digital root of n {\displaystyle n} . The multiplicative digital root for the first few positive integers...

The digital root (also repeated digital sum) of a natural number in a given radix is the (single digit) value obtained by an iterative process of summing...

each nonzero natural number n; the rational numbers, by including a multiplicative inverse 1 / n {\displaystyle 1/n} for each nonzero integer n (and also...

is the smallest number of multiplicative persistence 3. In base 10, there is thought to be no number with a multiplicative persistence greater than 11;...

includes as a subproblem a special instance of the problem of finding the multiplicative order of a modular integer or of an element in a finite field. However...

decimal digital root of any non-zero integer will be a number in the range 1 to 9, whereas the digit sum can take any value. Digit sums and digital roots...

prime power (except powers of 2 greater than 4) has a primitive root; thus the multiplicative group of integers modulo pn (that is, the group of units of...

Digit sum Digit sum Digital root Self Sum-product Digit product Multiplicative digital root Sum-product Coding-related Meertens Other Dudeney Factorion...

from the multiplicative group of the field to a totally ordered additive group, also called orders), absolute values (certain multiplicative mappings...

Digit sum Digit sum Digital root Self Sum-product Digit product Multiplicative digital root Sum-product Coding-related Meertens Other Dudeney Factorion...