85186913 has 16 divisors (see below), whose sum is σ = 102326400. Its totient is φ = 69382656.

The previous prime is 85186909. The next prime is 85186921. The reversal of 85186913 is 31968158.

It is not a de Polignac number, because 85186913 - 2² = 85186909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85186903) 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 15 ways as a sum of consecutive naturals, for example, 7313 + ... + 14961.

It is an arithmetic number, because the mean of its divisors is an integer number (6395400).

Almost surely, 2^85186913 is an apocalyptic number.

It is an amenable number.

85186913 is a deficient number, since it is larger than the sum of its proper divisors (17139487).

85186913 is a wasteful number, since it uses less digits than its factorization.

85186913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7736.

The product of its digits is 51840, while the sum is 41.

The square root of 85186913 is about 9229.6756714415. The cubic root of 85186913 is about 440.0050154387.

The spelling of 85186913 in words is "eighty-five million, one hundred eighty-six thousand, nine hundred thirteen".