A139412 Numbers n such that phi(n)=10^phi(d_1)+10^phi(d_2)+...+10^phi(d_k) where d_1d_2...d_k is the decimal expansion of n.

231, 34386, 3775375

Offset: 1

Author

Farideh Firoozbakht, May 11 2008

Keywords

• base
• nonn
• bref

Examples

			phi(3775375)=10^phi(3)+10^phi(7)+10^phi(7)+10^phi(5)+10^phi(3)+
10^phi(7)+10^phi(5).
		

Crossrefs

Cf. A139411, A139413.