109939

Appears in sequences

• Ruth-Aaron numbers (1): sum of prime divisors of n = sum of prime divisors of n+1.at n=41A006145
• Numbers k such that sigma(k+1) = 2*sigma(k).at n=21A067081
• Numbers k such that s(k) = s(k+1), where s(k) is A059975.at n=34A327250
• Smaller term of each Ruth-Aaron pair in which the sum of distinct prime factors is a prime number.at n=12A372455