85173587 has 8 divisors (see below), whose sum is σ = 90547632. Its totient is φ = 79840000.

The previous prime is 85173563. The next prime is 85173589. The reversal of 85173587 is 78537158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85173587 - 2⁸ = 85173331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85173589) 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 7 ways as a sum of consecutive naturals, for example, 5714 + ... + 14247.

It is an arithmetic number, because the mean of its divisors is an integer number (11318454).

Almost surely, 2^85173587 is an apocalyptic number.

85173587 is a deficient number, since it is larger than the sum of its proper divisors (5374045).

85173587 is a wasteful number, since it uses less digits than its factorization.

85173587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20229.

The product of its digits is 235200, while the sum is 44.

The square root of 85173587 is about 9228.9537326828. The cubic root of 85173587 is about 439.9820705504.

The spelling of 85173587 in words is "eighty-five million, one hundred seventy-three thousand, five hundred eighty-seven".