85604531 has 4 divisors (see below), whose sum is σ = 87425952. Its totient is φ = 83783112.

The previous prime is 85604527. The next prime is 85604543. The reversal of 85604531 is 13540658.

It is a happy number.

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 85604531 - 2² = 85604527 is a prime.

It is a super-2 number, since 2×85604531² = 14656271455459922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85604501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 910640 + ... + 910733.

It is an arithmetic number, because the mean of its divisors is an integer number (21856488).

Almost surely, 2^85604531 is an apocalyptic number.

85604531 is a deficient number, since it is larger than the sum of its proper divisors (1821421).

85604531 is a wasteful number, since it uses less digits than its factorization.

85604531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821420.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 85604531 is about 9252.2716670016. The cubic root of 85604531 is about 440.7228665199.

The spelling of 85604531 in words is "eighty-five million, six hundred four thousand, five hundred thirty-one".