128879
This number is a prime.
Just showing those entries submitted by 'Sariyar': (Click here to show all)
The smallest emirp such that the sum of digits of its prime
index is an emirp and equal to the reversal of the sum of
digits of its reversal's prime index, i.e,
π(128879)=12064, π(978821)=76990 and
1+2+0+6+4=reversal(7+6+9+9+0)=13. [Sariyar]
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