85122619 has 2 divisors, whose sum is σ = 85122620. Its totient is φ = 85122618.

The previous prime is 85122617. The next prime is 85122623. The reversal of 85122619 is 91622158.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85122619 - 2¹ = 85122617 is a prime.

It is a super-2 number, since 2×85122619² = 14491720530838322, which contains 22 as substring.

Together with 85122617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (85122617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42561309 + 42561310.

It is an arithmetic number, because the mean of its divisors is an integer number (42561310).

Almost surely, 2^85122619 is an apocalyptic number.

85122619 is a deficient number, since it is larger than the sum of its proper divisors (1).

85122619 is an equidigital number, since it uses as much as digits as its factorization.

85122619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The square root of 85122619 is about 9226.1920097080. The cubic root of 85122619 is about 439.8942910658.

The spelling of 85122619 in words is "eighty-five million, one hundred twenty-two thousand, six hundred nineteen".