179998

Appears in sequences

• Quasi-Carmichael numbers to base -2: squarefree composites n such that for every prime p that divides n, p+2 divides n+2.at n=7A029562
• Smallest number m larger than prime(n) such that prime(n) = sum of digits of m and prime(n) = largest prime factor of m (or 0 if no such number exists).at n=12A052022
• a(n) = smallest k having at least five prime divisors d such that (d + n) | (k + n).at n=1A202160
• Second smallest multiple of n whose digits sum to n.at n=42A245065
• Even Quasi-Carmichael numbers.at n=11A262252
• Least Quasi-Carmichael number with n prime factors.at n=3A270860
• Number of irreducible conic curves containing 6 points of a cyclic order n-torsion subgroup of an elliptic curve.at n=38A379920