3337333

Properties

Appears in sequences

• Primes that contain digits 3 and 7 only.at n=28A020463
• Palindromic terms from A019546.at n=24A045336
• Palindromic primes with just two distinct prime digits.at n=14A058375
• Palindromic wing primes (a.k.a. near-repdigit palindromic primes) of the general form r*(10^d - 1)/9 + (m-r)*10^floor(d/2) where d is the number of digits (an odd number > 1), r is the repeated digit, and m (different from r) is the middle digit.at n=24A077798
• Palindromic primes with middle digit 7.at n=36A082443
• Palindromic prime units W appearing eight times in third-order fractal palindromic primes WvWxWvWmWvWxWvW, where parts WvWxWvW, WvW are also palindromic primes.at n=20A082600
• Palindromic primes in which a single digit is sandwiched between strings of 3's.at n=6A088282
• Palindromic primes with d digits which have more than 3*d/2 distinct primes as substrings, for any d > 0.at n=15A168168
• Primes p such that one digit appears exactly six times together with a single different digit.at n=17A257937
• a(n) = (10^(2n+1)-1)/3 + 4*10^n.at n=3A332137
• Prime numbersat n=239373