59999999

Properties

Appears in sequences

• Primes that contain digits 5 and 9 only.at n=27A020468
• Smaller of two consecutive primes which have no common digits.at n=30A068803
• Smallest prime whose digital sum is equal to the n-th composite number, or 0 if no such prime exists.at n=47A073867
• Primes of the form identical digits preceded by a 5.at n=9A090153
• 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=32A093850
• Primes of the form 6*10^k - 1.at n=5A093946
• Positive integers a such that f(3a)+f(a)=concatenation of 3a and a, where f(k)=k(k+3)/2 (A000096).at n=7A099151
• Smallest prime whose digital sum is equal to the n-th composite number not congruent to 0 (modulo 3).at n=26A111380
• Smallest prime of the form 5 followed by n copies of some k.at n=6A112749
• Smallest number whose sum of digits is 2n.at n=34A133296
• 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=22A141311
• Least prime p with digit sum A047235(n).at n=22A152652
• Primes p where the digital sum is equal to 68.at n=0A244918
• Prime numbersat n=3562115