2777777777
domain: N
Appears in sequences
- Primes of the form a string of identical digits preceded by a 2.at n=13A090150
- Primes of the form 2*10^k + 7*R_k, where R_k is the repunit (A002275) of length k.at n=3A093938
- Smallest prime of the form 2 followed by n copies of k.at n=8A112747
- Numbers m such that m + sigma(m) is a repdigit.at n=35A116017