89999

Appears in sequences

• Numbers having four 9's in base 10.at n=8A043528
• Smallest number whose sum of digits is n.at n=44A051885
• Smallest composite number with digit sum n.at n=43A067524
• Numbers n such that (i) the sum of the distinct primes dividing n is divisible by the largest prime dividing n and (ii) n has exactly 4 distinct prime factors and (iii) n is squarefree.at n=33A071143
• a(n) is the smallest composite number with the sum of digits = the n-th composite number.at n=28A073866
• a(n) = smallest multiple of 7 with a digit sum = n.at n=42A077493
• Numbers k such that the "inventory" A063850 of k is a perfect square.at n=34A079465
• Maximal difference between two n-digit numbers.at n=4A109002
• Smallest number whose sum of digits is 2n.at n=22A133296
• a(1)=0, a(n+1) is the smallest nonprime with sum of digits > sum of digits of a(n).at n=40A156673
• The smallest composite number larger than the n-th composite number, which has a sum of digits equal to the n-th composite number.at n=28A161551
• The smallest number larger than n with digital sum equal to n.at n=43A161561
• Numbers n such that sigma(n)/phi(n) = 16/9.at n=5A164647
• Lexicographically earliest injective sequence such that a(n) = A007953(a(a(n))), where A007953 = sum of digits (in base 10).at n=43A167152
• a(n) = (n-1)*(n+2)*(n^2 + n + 2)/4.at n=23A168566
• a(n) = (8*n+3)*(8*n+5).at n=37A177065
• Smallest odd number with digit sum equal to n.at n=43A205960
• a(n) = Sum_{0<j<k<=n} k^3-j^3.at n=12A206809
• Numbers such that the minimum distance between divisors of n occurs only between composite numbers.at n=3A253266
• Smallest multiple of n whose sum of digits is greater than n.at n=42A269332