868813 has 8 divisors (see below), whose sum is σ = 997920. Its totient is φ = 748080.

The previous prime is 868801. The next prime is 868817. The reversal of 868813 is 318868.

868813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1870 + ... + 2287.

It is an arithmetic number, because the mean of its divisors is an integer number (124740).

2⁸⁶⁸⁸¹³ is an apocalyptic number.

It is an amenable number.

868813 is a deficient number, since it is larger than the sum of its proper divisors (129107).

868813 is a wasteful number, since it uses less digits than its factorization.

868813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4187.

The product of its digits is 9216, while the sum is 34.

The square root of 868813 is about 932.1013893349. The cubic root of 868813 is about 95.4205913181.

Subtracting from 868813 its reverse (318868), we obtain a palindrome (549945).

It can be divided in two parts, 868 and 813, that added together give a square (1681 = 41²).

The spelling of 868813 in words is "eight hundred sixty-eight thousand, eight hundred thirteen".