865486879 has 4 divisors (see below), whose sum is σ = 911038840. Its totient is φ = 819934920.

The previous prime is 865486837. The next prime is 865486883. The reversal of 865486879 is 978684568.

865486879 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.

It is a cyclic number.

It is not a de Polignac number, because 865486879 - 2⁷ = 865486751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865486829) 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, 22775952 + ... + 22775989.

It is an arithmetic number, because the mean of its divisors is an integer number (227759710).

Almost surely, 2^865486879 is an apocalyptic number.

865486879 is a deficient number, since it is larger than the sum of its proper divisors (45551961).

865486879 is a wasteful number, since it uses less digits than its factorization.

865486879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45551960.

The product of its digits is 23224320, while the sum is 61.

The square root of 865486879 is about 29419.1583666155. The cubic root of 865486879 is about 952.9866776232.

The spelling of 865486879 in words is "eight hundred sixty-five million, four hundred eighty-six thousand, eight hundred seventy-nine".