13131331

Properties

Appears in sequences

• Primes consisting only of digits 1 and 3 occurring with equal frequency.at n=6A087511
• Smallest prime which is the repeated reverse concatenation of n followed by n (ending in n), where n == 1,3,7 or 9 (mod 10), or 0 if no such prime exists.at n=12A110408
• Primes consisting of two digits only, each digit with frequency f = 4.at n=9A173002
• Prime numbersat n=857201