A number 
satisfies the Carmichael condition iff 
for all prime divisors 
of 
. This is equivalent to the condition 
for all prime divisors 
of 
.
Carmichael Condition
See also
Carmichael NumberExplore with Wolfram|Alpha
References
Borwein, D.; Borwein, J. M.; Borwein, P. B.; and Girgensohn, R. "Giuga's Conjecture on Primality." Amer. Math. Monthly 103, 40-50, 1996.Referenced on Wolfram|Alpha
Carmichael ConditionCite this as:
Weisstein, Eric W. "Carmichael Condition." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/CarmichaelCondition.html