864999135 has 256 divisors, whose sum is σ = 2132766720. Its totient is φ = 320993280.

The previous prime is 864999133. The next prime is 864999197. The reversal of 864999135 is 531999468.

It is not a de Polignac number, because 864999135 - 2¹ = 864999133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864999133) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 4999909 + ... + 5000081.

It is an arithmetic number, because the mean of its divisors is an integer number (8331120).

Almost surely, 2^864999135 is an apocalyptic number.

864999135 is an abundant number, since it is smaller than the sum of its proper divisors (1267767585).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

864999135 is a wasteful number, since it uses less digits than its factorization.

864999135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 249 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 864999135 is about 29410.8676342606. The cubic root of 864999135 is about 952.8076258518.

It can be divided in two parts, 864 and 999135, that added together give a palindrome (999999).

The spelling of 864999135 in words is "eight hundred sixty-four million, nine hundred ninety-nine thousand, one hundred thirty-five".