86605 has 4 divisors (see below), whose sum is σ = 103932. Its totient is φ = 69280.

The previous prime is 86599. The next prime is 86627. The reversal of 86605 is 50668.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27556 + 59049 = 166^2 + 243^2 .

It is not a de Polignac number, because 86605 - 2⁵ = 86573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8656 + ... + 8665.

It is an arithmetic number, because the mean of its divisors is an integer number (25983).

2⁸⁶⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

86605 is a deficient number, since it is larger than the sum of its proper divisors (17327).

86605 is a wasteful number, since it uses less digits than its factorization.

86605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17326.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 86605 is about 294.2872746144. The cubic root of 86605 is about 44.2433145549.

Subtracting from 86605 its reverse (50668), we obtain a cube (35937 = 33³).

The spelling of 86605 in words is "eighty-six thousand, six hundred five".