86585129 has 4 divisors (see below), whose sum is σ = 86963460. Its totient is φ = 86206800.

The previous prime is 86585119. The next prime is 86585141. The reversal of 86585129 is 92158568.

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 76650025 + 9935104 = 8755^2 + 3152^2 .

It is a cyclic number.

It is not a de Polignac number, because 86585129 - 2⁸ = 86584873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 86585129.

It is not an unprimeable number, because it can be changed into a prime (86585119) 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, 188822 + ... + 189279.

It is an arithmetic number, because the mean of its divisors is an integer number (21740865).

Almost surely, 2^86585129 is an apocalyptic number.

It is an amenable number.

86585129 is a deficient number, since it is larger than the sum of its proper divisors (378331).

86585129 is a wasteful number, since it uses less digits than its factorization.

86585129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378330.

The product of its digits is 172800, while the sum is 44.

The square root of 86585129 is about 9305.1130568091. The cubic root of 86585129 is about 442.3993050799.

The spelling of 86585129 in words is "eighty-six million, five hundred eighty-five thousand, one hundred twenty-nine".