663929729

Properties

Appears in sequences

• Prime numbers p where d(p-1) = d(p+1) increases to a record.at n=16A190821
• a(n) is the smallest number m such that tau(m-1) = tau(m+1) = tau(m)^n, where tau(m) is the number of divisors of m (A000005).at n=7A350132
• Prime numbersat n=34479865