79999999

Appears in sequences

• Triangle T(n,k) = 10^(n-1) -1 + k*floor(9*10^(n-1)/(n+1)), with 1 <= r <= n, read by rows.at n=34A093850
• Smallest semiprime containing exactly n 9's.at n=6A104775
• Smallest semiprime ending in exactly n 9's.at n=6A106663
• Smallest number whose sum of digits is 3n+1.at n=23A133264
• Smallest number whose sum of digits is 2n.at n=35A133296
• Minimum number k for which the digital sum of k*n is 7*n.at n=10A147827
• a(n) = 8*10^n - 1.at n=7A198973
• Numbers n such that the digits of antisigma(n) end in phi(n).at n=22A248818