79999

Properties

Appears in sequences

• Primes that contain digits 7 and 9 only.at n=12A020471
• Numbers having four 9's in base 10.at n=7A043528
• Smallest number whose digits sum to n-th prime.at n=13A046864
• Smallest number whose sum of digits is n.at n=43A051885
• Smallest prime number whose digits sum to n-th prime.at n=13A054750
• a(n) = smallest prime q of form q=-1+(p+1)*10^w, where p is n-th prime, or 0 if there is no such prime.at n=21A055785
• Primes at which sum of digits strictly increases.at n=25A061248
• Smallest prime p such that n is a solution mod p of x^4 = 2, or 0 if no such prime exists.at n=18A065902
• Smallest prime with digit sum n, or 0 if no such prime exists.at n=42A067180
• The smallest prime with a possible given digit sum.at n=28A067523
• Smaller of two consecutive primes which have no common digits.at n=21A068803
• Smallest prime (> n-th prime) with sum of digits = the n-th prime, or 0 if no such prime exists.at n=13A075360
• Primes of the form 2^r*5^s - 1.at n=19A077313
• a(n) = smallest k such that 5k has a digit sum = n.at n=43A077492
• Duplicate of A054750.at n=13A082257
• 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=27A083983
• Primes of the form identical digits preceded by a 7.at n=6A090155
• Primes of the form 8*10^k - 1.at n=2A093947
• Near-repdigit primes with 9 as repeated digit.at n=16A105975
• Primes with minimal digit = 7.at n=34A106107