68543

Properties

Appears in sequences

• Least prime p such that sigma(x)=sigma(p) has exactly n solutions.at n=41A115374
• Primes p such that (p reversed)+10 is a square.at n=14A167474
• Smallest weak prime in base n.at n=21A186995
• Primes prime(k) such that the sum of the squares of digits of prime(k) equals the sum of the squares of digits of k.at n=35A193255
• a(n) is the smallest prime that becomes composite if any single digit of its base-n expansion is changed to a different digit (but not to zero).at n=21A323745
• Smallest weak prime in base 2n+1.at n=10A371475
• a(n) is the smallest prime that becomes composite if any single digit of its base-(2n+1) expansion is changed to a different digit (but not to zero).at n=10A371509
• Prime numbersat n=6817