6220607

Appears in sequences

• Numbers k such that (k, k+2) are not twin primes yet sigma(k+2)/d(k+2) - sigma(k)/d(k) = 1.at n=13A322668
• Numbers k such that k and k+2 have the same deficiency (A033879).at n=11A330901
• Numbers k such that k and k+2 have the same unitary abundance (A129468).at n=35A335252