This number is a prime.
The smallest Honaker emirp P whose prime index (1868701) is another Honaker emirp. Curiously, sod(P)=31 is also an emirp. [Bajpai]
The smallest Honaker emirp P whose prime index (1868701) is
another Honaker emirp. Curiously, sod(P)=31 is also an
emirp. [Bajpai]