85928813 has 4 divisors (see below), whose sum is σ = 86314368. Its totient is φ = 85543260.

The previous prime is 85928803. The next prime is 85928861. The reversal of 85928813 is 31882958.

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 85928813 - 2¹² = 85924717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85928803) 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, 192443 + ... + 192888.

It is an arithmetic number, because the mean of its divisors is an integer number (21578592).

Almost surely, 2^85928813 is an apocalyptic number.

It is an amenable number.

85928813 is a deficient number, since it is larger than the sum of its proper divisors (385555).

85928813 is a wasteful number, since it uses less digits than its factorization.

85928813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385554.

The product of its digits is 138240, while the sum is 44.

The square root of 85928813 is about 9269.7795550919. The cubic root of 85928813 is about 441.2786720154.

The spelling of 85928813 in words is "eighty-five million, nine hundred twenty-eight thousand, eight hundred thirteen".