313133

Properties

Appears in sequences

• Primes that contain digits 1 and 3 only.at n=26A020451
• If k is a number with exactly two distinct decimal digits, say a and b, neither of which is 0 (i.e., a member of A101594), define the self-complement of k, SC(k), to be the number obtained by replacing a with b and vice versa. E.g. SC(232233) = 323322. Sequence contains primes p such that SC(p) is also a prime.at n=36A083983
• a(n) has decimal expansion 3nn3.at n=13A100896
• Primes of the concatenated form 3nn3.at n=0A102499
• Prime numbersat n=27044