899999

Appears in sequences

• Smallest number whose digits sum to n-th prime.at n=15A046864
• a(n) is the smallest composite number with the sum of digits = the n-th prime number.at n=15A073868
• Smallest semiprime containing exactly n 9's.at n=4A104775
• Smallest semiprime ending in exactly n 9's.at n=4A106663
• Maximal difference between two n-digit numbers.at n=5A109002
• Smallest number whose sum of digits is 2n+1.at n=26A131668
• Lexicographically earliest injective sequence such that a(n) = A007953(a(a(n))), where A007953 = sum of digits (in base 10).at n=52A167152
• The semiprimes which set new records for the sum of their decimal digits.at n=40A257652
• Least k such that n divides A045876(k).at n=52A276597
• Partial sums of A278742.at n=24A280730
• A number N is called a "rebel" number if there do not exist two integers a and b such that N = a + b with a > b > 0 and S(a) = S(b) where S(n) is the sum of the digits of the number n.at n=44A292514
• a(n) is the least k such that the sum of digits of k is a substring of n and the sum of digits of n is a substring of k.at n=53A344486