391
This number is a composite.
33 + 92 + 11 is an invertible prime. [Bajpai]
3³ + 9³ + 1³ is the palindromic prime number of 3-digit composite numbers. [Homewood]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Reginald McLean
This number is a composite.
33 + 92 + 11 is an invertible prime. [Bajpai]
3³ + 9³ + 1³ is the palindromic prime number of 3-digit composite numbers. [Homewood]