Armstrong

Answer 1

https://www.sololearn.com/discuss/333866/?ref=app
https://www.sololearn.com/discuss/503076/?ref=app
https://www.sololearn.com/discuss/128844/?ref=app

https://en.m.wikipedia.org/wiki/Narcissistic_number
Narcissistic number - Wikipedia

http://pages.mtu.edu/~shene/COURSES/cs201/NOTES/chap04/arms.html
Armstrong Numbers - What is pages.mtu.edu?

http://mathworld.wolfram.com/NarcissisticNumber.html
Narcissistic Number -- from Wolfram MathWorld

Answer 2

https://www.sololearn.com/discuss/321242/?ref=app

Please explain.