29999999

Properties

Appears in sequences

• Greatest integer that is <= the sum of the n-th powers of its digits.at n=6A035027
• Primes of the form 2999...999.at n=4A055559
• Smaller of two consecutive primes which have no common digits.at n=29A068803
• Smallest prime whose digital sum is equal to the n-th composite number, or 0 if no such prime exists.at n=45A073867
• Primes of the form a string of identical digits preceded by a 2.at n=12A090150
• Triangle T(n,k) = 10^(n-1) -1 + k*floor(9*10^(n-1)/(n+1)), with 1 <= r <= n, read by rows.at n=29A093850
• Primes with digit sum = 65.at n=0A107619
• Smallest prime whose digital sum is equal to the n-th composite number not congruent to 0 (modulo 3).at n=25A111380
• Smallest prime of the form 2 followed by n copies of k.at n=6A112747
• Primes of the form p = k*10^m - 1 where k is 3, 6 or 9, such that p+2 is also a prime.at n=5A124643
• Smallest number whose sum of digits is 2n+1.at n=32A131668
• Primes consisting of a digit and a nonempty string of 9's (i.e., primes of the form k*10^m - 1, where k is any digit).at n=21A141311
• Greatest number k such that sum of the n-th powers of the digits of k is greater than k.at n=5A174944
• a(n) = 3*10^n - 1.at n=7A198698
• Square array read by antidiagonals upwards: M(n,k) is the initial occurrence of first prime p1 of consecutive primes p1, p2, where p2 - p1 = 2*k, and p1, p2 span a multiple of 10^n, n>=1, k>=1.at n=21A287050
• List of pairs (p, q) of twin primes with distinct leading digits.at n=14A366679
• Prime numbersat n=1857859