86165729 has 4 divisors (see below), whose sum is σ = 92793876. Its totient is φ = 79537584.

The previous prime is 86165713. The next prime is 86165731. The reversal of 86165729 is 92756168.

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 39037504 + 47128225 = 6248^2 + 6865^2 .

It is a cyclic number.

It is not a de Polignac number, because 86165729 - 2⁴ = 86165713 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 86165729.

It is not an unprimeable number, because it can be changed into a prime (86165759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3314054 + ... + 3314079.

It is an arithmetic number, because the mean of its divisors is an integer number (23198469).

Almost surely, 2^86165729 is an apocalyptic number.

It is an amenable number.

86165729 is a deficient number, since it is larger than the sum of its proper divisors (6628147).

86165729 is a wasteful number, since it uses less digits than its factorization.

86165729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6628146.

The product of its digits is 181440, while the sum is 44.

The square root of 86165729 is about 9282.5497036105. The cubic root of 86165729 is about 441.6838525333.

The spelling of 86165729 in words is "eighty-six million, one hundred sixty-five thousand, seven hundred twenty-nine".