This number is a prime.
This prime is expressed by 4^9+6^6+9^4 where you can see the semiprime digits in order as bases and in reverse order as exponents. Curiously the sum of the digits of the prime equals the sum ofthe semiprimes. [Silva]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell