A067779 Primes such that the sum of the squares of its digits is equal to the product of its digits.
11353, 13513, 15313, 15331, 31153, 31513, 31531, 33151, 35311, 51133, 53113, 1125221, 1212251, 1212521, 1221251, 1252211, 1512221, 2115221, 2122151, 2122511, 2151221, 2152211, 2215211, 2221511, 2251121, 2251211, 5122121
Offset: 1
Examples
An eight-digit term is 11224121, a ten-digit term is 1111111843. 11353 belongs to the sequence because 1^2+1^2+3^2+5^2+3^2=45=1*1*3*5*3
Programs
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PARI
forprime(p=2,6e6, n=p; sd=0; pd=1; while(n>0,d=divrem(n,10); n=d[1]; sd=sd+d[2]*d[2]; pd=pd*d[2]); if(sd==pd,print1(p,",")))
Extensions
Edited and extended by Klaus Brockhaus Feb 11 2002