85404831 has 4 divisors (see below), whose sum is σ = 113873112. Its totient is φ = 56936552.

The previous prime is 85404811. The next prime is 85404859. The reversal of 85404831 is 13840458.

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 85404831 - 2⁵ = 85404799 is a prime.

It is a super-2 number, since 2×85404831² = 14587970316277122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85404792 and 85404801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85404811) 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, 14234136 + ... + 14234141.

It is an arithmetic number, because the mean of its divisors is an integer number (28468278).

Almost surely, 2^85404831 is an apocalyptic number.

85404831 is a deficient number, since it is larger than the sum of its proper divisors (28468281).

85404831 is a wasteful number, since it uses less digits than its factorization.

85404831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28468280.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 85404831 is about 9241.4734214843. The cubic root of 85404831 is about 440.3798905767.

The spelling of 85404831 in words is "eighty-five million, four hundred four thousand, eight hundred thirty-one".