85618619 has 4 divisors (see below), whose sum is σ = 87706920. Its totient is φ = 83530320.

The previous prime is 85618607. The next prime is 85618639. The reversal of 85618619 is 91681658.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85618619 - 2⁸ = 85618363 is a prime.

It is a super-2 number, since 2×85618619² = 14661095838934322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85618619.

It is not an unprimeable number, because it can be changed into a prime (85618639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1044089 + ... + 1044170.

It is an arithmetic number, because the mean of its divisors is an integer number (21926730).

Almost surely, 2^85618619 is an apocalyptic number.

85618619 is a deficient number, since it is larger than the sum of its proper divisors (2088301).

85618619 is a wasteful number, since it uses less digits than its factorization.

85618619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088300.

The product of its digits is 103680, while the sum is 44.

The square root of 85618619 is about 9253.0329622238. The cubic root of 85618619 is about 440.7470418881.

The spelling of 85618619 in words is "eighty-five million, six hundred eighteen thousand, six hundred nineteen".