- Euler's totient. Jordan's
totient is a
generalization of Euler's. The
cototient of n is
defined as n − φ(n). It
counts the
number of
positive integers...
- In
number theory, a
branch of mathematics, a
highly cototient number is a
positive integer k {\displaystyle k}
which is
above 1 and has more solutions...
-
primeval number and a
permutable prime with 131 and 311. 113 is a
highly cototient number and a
centered square number. 113 is the
denominator of 355/113...
- 6084 = 782, sum of the
cubes of the
first twelve integers 6089 –
highly cototient number 6095 –
magic constant of n × n
normal magic square and n-Queens...
-
tetrahedral number, a
pentagonal number, and a
pentatope number. 35 is a
highly cototient number,
since there are more
solutions to the
equation x − φ ( x ) = 35...
-
wickets taken in first-class
cricket by
Wilfred Rhodes 4199 –
highly cototient number,
product of
three consecutive primes 4200 –
nonagonal number, pentagonal...
-
prime with no
imaginary part and real part of the form 3n − 1. a
highly cototient number. the
number of
primes that are right-truncatable. a super-prime...
- –
Proth prime, both a left- and right-truncatable
prime 3149 –
highly cototient number 3155 –
member of the Mian–Chowla
sequence 3159 =
number of trees...
-
consecutive primes (7 + 11 + 13 + 17 + 19 + 23 + 29). 119 is a
highly cototient number. 119 is one of five
numbers to hold a sum-of-divisors of 144 =...
- form 2p-1 5244 = 222 + 232 + … + 292 = 202 + 212 + … + 282 5249 –
highly cototient number 5253 –
triangular number 5279 –
Sophie Germain prime, twin prime...
