813373 has 4 divisors (see below), whose sum is σ = 887328. Its totient is φ = 739420.

The previous prime is 813367. The next prime is 813377. The reversal of 813373 is 373318.

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 de Polignac number, because none of the positive numbers 2^k-813373 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 (813377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36961 + ... + 36982.

It is an arithmetic number, because the mean of its divisors is an integer number (221832).

2⁸¹³³⁷³ is an apocalyptic number.

It is an amenable number.

813373 is a deficient number, since it is larger than the sum of its proper divisors (73955).

813373 is a wasteful number, since it uses less digits than its factorization.

813373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73954.

The product of its digits is 1512, while the sum is 25.

The square root of 813373 is about 901.8719421293. The cubic root of 813373 is about 93.3461872886.

The spelling of 813373 in words is "eight hundred thirteen thousand, three hundred seventy-three".