864853 has 4 divisors (see below), whose sum is σ = 943488. Its totient is φ = 786220.

The previous prime is 864817. The next prime is 864883. The reversal of 864853 is 358468.

864853 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 864853 - 2⁹ = 864341 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 (864803) 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, 39301 + ... + 39322.

It is an arithmetic number, because the mean of its divisors is an integer number (235872).

2⁸⁶⁴⁸⁵³ is an apocalyptic number.

It is an amenable number.

864853 is a deficient number, since it is larger than the sum of its proper divisors (78635).

864853 is a wasteful number, since it uses less digits than its factorization.

864853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78634.

The product of its digits is 23040, while the sum is 34.

The square root of 864853 is about 929.9747308395. The cubic root of 864853 is about 95.2753966305.

The spelling of 864853 in words is "eight hundred sixty-four thousand, eight hundred fifty-three".