8355841

Appears in sequences

• Carmichael numbers C such that C-1 is not a Niven/Harshad number.at n=22A097061
• Numbers that are both Poulet and Proth.at n=8A242880
• Carmichael numbers k such that the odd part of k-1 is squarefree.at n=13A263403
• Carmichael numbers (A002997) that are the sum of two squares.at n=30A265237
• Numbers n > 2 such that A258409(n)*A002322(n) divides n-1.at n=14A284671
• Carmichael numbers k such that phi(k) divides (k-1)*lambda(k).at n=21A306338
• Composite numbers k such that phi(k) divides d*(k - 1) for some squarefree divisor d of k - 1.at n=6A337316
• Carmichael numbers k for which the 2-adic valuation of phi(k) does not exceed the 2-adic valuation of k-1.at n=5A339818
• The greater of twin Carmichael numbers: a pair of consecutive Carmichael numbers (A002997) without a non-prime-power weak Carmichael number (A087442) between them.at n=11A365023
• Carmichael numbers k such that k-1 is a Novak-Carmichael number.at n=18A375322