813389 has 4 divisors (see below), whose sum is σ = 815424. Its totient is φ = 811356.

The previous prime is 813383. The next prime is 813401. The reversal of 813389 is 983318.

813389 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 813389 - 2⁸ = 813133 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813383) 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, 197 + ... + 1290.

It is an arithmetic number, because the mean of its divisors is an integer number (203856).

2⁸¹³³⁸⁹ is an apocalyptic number.

It is an amenable number.

813389 is a deficient number, since it is larger than the sum of its proper divisors (2035).

813389 is a wasteful number, since it uses less digits than its factorization.

813389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034.

The product of its digits is 5184, while the sum is 32.

The square root of 813389 is about 901.8808125246. The cubic root of 813389 is about 93.3467993609.

The spelling of 813389 in words is "eight hundred thirteen thousand, three hundred eighty-nine".