85618829 has 4 divisors (see below), whose sum is σ = 86824800. Its totient is φ = 84412860.

The previous prime is 85618789. The next prime is 85618859. The reversal of 85618829 is 92881658.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85618829 - 2²⁰ = 84570253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85618859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 602879 + ... + 603020.

It is an arithmetic number, because the mean of its divisors is an integer number (21706200).

Almost surely, 2^85618829 is an apocalyptic number.

It is an amenable number.

85618829 is a deficient number, since it is larger than the sum of its proper divisors (1205971).

85618829 is a wasteful number, since it uses less digits than its factorization.

85618829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205970.

The product of its digits is 276480, while the sum is 47.

The square root of 85618829 is about 9253.0443098474. The cubic root of 85618829 is about 440.7474022334.

The spelling of 85618829 in words is "eighty-five million, six hundred eighteen thousand, eight hundred twenty-nine".