1066889
This number is a prime.
The smallest invertible prime p containing all of the
invertible digits that becomes a Sophie Germain prime q
(6889901) when turned upside down. Curiously, p and q can
be expressed as the sum of two squares, viz., (835^2 +
608^2) and (1901^2+1810^2) respectively. [Bajpai]
The smallest invertible prime P containing all the
invertible digits {0, 1, 6, 8, 9} that is the greater
member of a sexy prime pair: {1066883, 1066889}. [Bajpai]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell