189143

Appears in sequences

• Nonprime terms in A210494.at n=29A230214
• Numbers k with same last four digits as p, prime(k)=p.at n=20A232189
• a(n) is the largest integer k such that sigma(k)/(d(k)*sopf(k)) = n where d=A000005, sigma=A000203 and sopf=A008472.at n=17A328175