864535389 has 16 divisors (see below), whose sum is σ = 1182444480. Its totient is φ = 561530240.

The previous prime is 864535379. The next prime is 864535393. The reversal of 864535389 is 983535468.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 864535389 - 2⁹ = 864534877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864535369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93622 + ... + 102440.

It is an arithmetic number, because the mean of its divisors is an integer number (73902780).

Almost surely, 2^864535389 is an apocalyptic number.

It is an amenable number.

864535389 is a deficient number, since it is larger than the sum of its proper divisors (317909091).

864535389 is a wasteful number, since it uses less digits than its factorization.

864535389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9660.

The product of its digits is 3110400, while the sum is 51.

The square root of 864535389 is about 29402.9826548260. The cubic root of 864535389 is about 952.6373213606.

The spelling of 864535389 in words is "eight hundred sixty-four million, five hundred thirty-five thousand, three hundred eighty-nine".