836813 has 4 divisors (see below), whose sum is σ = 839040. Its totient is φ = 834588.

The previous prime is 836807. The next prime is 836821. The reversal of 836813 is 318638.

836813 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, and also an emirpimes, since its reverse is a distinct semiprime: 318638 = 2 ⋅159319.

It is a cyclic number.

It is not a de Polignac number, because 836813 - 2⁶ = 836749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (836833) 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, 395 + ... + 1352.

It is an arithmetic number, because the mean of its divisors is an integer number (209760).

2⁸³⁶⁸¹³ is an apocalyptic number.

It is an amenable number.

836813 is a deficient number, since it is larger than the sum of its proper divisors (2227).

836813 is a wasteful number, since it uses less digits than its factorization.

836813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226.

The product of its digits is 3456, while the sum is 29.

The square root of 836813 is about 914.7748356836. The cubic root of 836813 is about 94.2344006717.

The spelling of 836813 in words is "eight hundred thirty-six thousand, eight hundred thirteen".