73121

Properties

Appears in sequences

• Numbers that are the sum of 6 nonzero 8th powers.at n=38A003384
• Smallest prime that begins with the digit reversal of prime(n).at n=32A093487
• a(1) = a(2) = a(3) = 1; for n>3, a(n) = a(n-1) + a(n-2) + a(n-3) iff n-1 is prime, otherwise a(n) = a(n-1) + 1.at n=39A113057
• Primes where the first digit equals the sum of all the other digits.at n=46A156307
• The sequence gives prime numbers formed from the sum of the squares of composite numbers and the corresponding prime numbers.at n=22A180233
• Primes 8k + 1 preceding the maximal gaps in A269424.at n=11A269425
• Prime numbersat n=7229