71354639domain: NPropertiesPrimalityPrimeyesAppears in sequencesSum of numerator and denominator in n-th harmonic number, 1 + 1/2 + 1/3 +...+ 1/n.at n=19A064168Primes that are the sum of the numerator and denominator of a harmonic number.at n=11A118727Prime numbersat n=4192986