99960004

Appears in sequences

• Squares obtained as a concatenation of k and 10's complement of k.at n=11A084004
• Numbers n such that every digit of n and sqrt(n) contains a loop (only digits 0,4,6,8,9 in n and sqrt(n)).at n=18A107627
• a(n) = the largest n-digit number with exactly 9 divisors, a(n) = 0 if no such number exists.at n=7A182678