864865699 has 4 divisors (see below), whose sum is σ = 872948664. Its totient is φ = 856782736.

The previous prime is 864865649. The next prime is 864865717. The reversal of 864865699 is 996568468.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 864865699 - 2⁷ = 864865571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864865649) 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, 4041322 + ... + 4041535.

It is an arithmetic number, because the mean of its divisors is an integer number (218237166).

Almost surely, 2^864865699 is an apocalyptic number.

864865699 is a deficient number, since it is larger than the sum of its proper divisors (8082965).

864865699 is a wasteful number, since it uses less digits than its factorization.

864865699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8082964.

The product of its digits is 22394880, while the sum is 61.

The square root of 864865699 is about 29408.5990655794. The cubic root of 864865699 is about 952.7586295113.

It can be divided in two parts, 8648 and 65699, that added together give a palindrome (74347).

The spelling of 864865699 in words is "eight hundred sixty-four million, eight hundred sixty-five thousand, six hundred ninety-nine".