69991

Properties

Appears in sequences

• Numbers n such that phi(reversal(n)) = reversal(phi(n)). Ignore leading 0's.at n=26A069282
• Primes p such that the differences between the 5 consecutive primes starting with p are (6,4,2,6).at n=7A078962
• a(n) = 7*10^n - 9.at n=3A086945
• Smallest positive real Gaussian prime having a gap size of exactly A128106(n).at n=22A128109
• Primes containing 999 as a substring.at n=18A167292
• Primes of the form 7n^2 - 9.at n=21A201854
• Number of ordered triples (w,x,y) with all terms in {-n, ..., -1, 1, ..., n} and 4w + x + y > 0.at n=26A211629
• Number of (w,x,y,z) with all terms in {0,...,n} and (least gapsize)<2.at n=20A212896
• Prime numbersat n=6934