78999

Appears in sequences

• Smallest number that takes n steps to reach 1 under iteration of sum-of-squares-of-digits map (= smallest "happy number" of height n).at n=7A001273
• Numbers that require exactly 8 iterations to determine that they are happy or not (A007770 and A031177).at n=8A193996
• Numbers that set a new integer record for the ratio between the product and the sum of their digits.at n=42A240520