45

This number is a composite.

Single Curio View:   (Seek other curios for this number)
The only known multidigit number n (up to 10^9) such that, n = reversal(sigma(n) - phi(n)) = reversal(sigma(n)) - reversal(phi(n)). [Capelle]

Submitted: 2009-11-15 19:12:46;   Last Modified: 2009-11-15 20:03:06.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell