811373 has 4 divisors (see below), whose sum is σ = 833340. Its totient is φ = 789408.

The previous prime is 811351. The next prime is 811379. The reversal of 811373 is 373118.

It is a happy number.

811373 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.

It can be written as a sum of positive squares in 2 ways, for example, as 779689 + 31684 = 883^2 + 178^2 .

It is a cyclic number.

It is not a de Polignac number, because 811373 - 2¹⁰ = 810349 is a prime.

It is a super-2 number, since 2×811373² = 1316652290258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811379) 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, 10928 + ... + 11001.

It is an arithmetic number, because the mean of its divisors is an integer number (208335).

2⁸¹¹³⁷³ is an apocalyptic number.

It is an amenable number.

811373 is a deficient number, since it is larger than the sum of its proper divisors (21967).

811373 is a wasteful number, since it uses less digits than its factorization.

811373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21966.

The product of its digits is 504, while the sum is 23.

The square root of 811373 is about 900.7624548126. The cubic root of 811373 is about 93.2696149563.

The spelling of 811373 in words is "eight hundred eleven thousand, three hundred seventy-three".