1717= 1²+7²+1²+7²
1²+7²+1²+7²=1+49+1+49
1+49+1+49 = 100
100 = 1² => Happy number
Where did you get that 2948089 from? Did I miss something :D
And I also like maths but for some reason, I am typing this comment instead of doing my math homework.
Upss is correct I knew that 1717 is a friendly number, but I did the memory calculation
XD
and then it was that I looked for the reference
Thank you ;)
These things happen :)