9999999997

Appears in sequences

• Numbers k such that k^2 contains only digits {0,4,9}, not ending with zero.at n=17A058443
• Largest n-digit semiprime.at n=9A098450
• Greatest hypotenuse of primitive Pythagorean triangle not exceeding 10^n.at n=9A117341
• a(n) = 10^n - 3.at n=9A173833
• a(n) is the largest n-digit number with exactly 4 divisors.at n=9A182648
• Largest n-digit lucky number.at n=9A261512
• Numbers k not divisible by 10 such that k^2 and 2*k are in A046030.at n=12A308961