4909177

Appears in sequences

• Carmichael numbers of the form C = p*(2p-1)*(n*(2p-2)+p), where p and 2p-1 are prime numbers.at n=25A182207
• Carmichael numbers divisible by 7.at n=22A182208
• Composite numbers n such that gcd(phi(n), n-1) = lambda(n), where lambda(n) = A002322(n).at n=29A264012
• Carmichael numbers ending in 7.at n=4A355307
• 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=8A365023