86705 has 4 divisors (see below), whose sum is σ = 104052. Its totient is φ = 69360.

The previous prime is 86693. The next prime is 86711. The reversal of 86705 is 50768.

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 57121 + 29584 = 239^2 + 172^2 .

It is not a de Polignac number, because 86705 - 2⁴ = 86689 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 86705.

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, 8666 + ... + 8675.

It is an arithmetic number, because the mean of its divisors is an integer number (26013).

2⁸⁶⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

86705 is a deficient number, since it is larger than the sum of its proper divisors (17347).

86705 is a wasteful number, since it uses less digits than its factorization.

86705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17346.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 86705 is about 294.4571276094. The cubic root of 86705 is about 44.2603367810.

Subtracting from 86705 its reverse (50768), we obtain a cube (35937 = 33³).

The spelling of 86705 in words is "eighty-six thousand, seven hundred five".