864539269 has 4 divisors (see below), whose sum is σ = 943133760. Its totient is φ = 785944780.

The previous prime is 864539251. The next prime is 864539293. The reversal of 864539269 is 962935468.

864539269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 864539269 - 2⁵ = 864539237 is a prime.

It is a super-2 number, since 2×864539269² = 1494856295286108722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864539069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39297229 + ... + 39297250.

It is an arithmetic number, because the mean of its divisors is an integer number (235783440).

Almost surely, 2^864539269 is an apocalyptic number.

It is an amenable number.

864539269 is a deficient number, since it is larger than the sum of its proper divisors (78594491).

864539269 is a wasteful number, since it uses less digits than its factorization.

864539269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78594490.

The product of its digits is 2799360, while the sum is 52.

The square root of 864539269 is about 29403.0486344529. The cubic root of 864539269 is about 952.6387464911.

The spelling of 864539269 in words is "eight hundred sixty-four million, five hundred thirty-nine thousand, two hundred sixty-nine".