106891601
This number is a prime.
The smallest Honaker emirp P containing all of the
invertible digits {0, 1, 6, 8, 9}, that yields another
Honaker emirp Q (109168901) when rotated by 180 degrees.
Curiously, P and Q both are expressible as the sum of two
squares. [Bajpai]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell