81649

Properties

Appears in sequences

• Numbers k such that 20^k - 19^k is prime.at n=8A062586
• Balanced primes of order twelve.at n=28A096704
• Primes of the form (p^2 - 1)/16 - p, where p is also a prime.at n=14A165616
• Primes of the form 7n^2 + 1.at n=26A201602
• Numbers with two or more digits such that every two consecutive digits are a square.at n=13A291334
• Primes containing nonprime digits (from 1 to 9) in their decimal expansion and whose digits are distinct, i.e., consisting of only digits 1, 4, 6, 8, 9.at n=31A323391
• Prime numbersat n=7986