333737

Properties

Appears in sequences

• Primes that contain digits 3 and 7 only.at n=17A020463
• 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=40A083983
• Number of Poulet numbers (or pseudoprimes to base 2, A001567) less than 2^n.at n=43A208276
• Prime numbersat n=28701