811339973 has 4 divisors (see below), whose sum is σ = 846615648. Its totient is φ = 776064300.

The previous prime is 811339937. The next prime is 811339979. The reversal of 811339973 is 379933118.

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 811339973 - 2¹⁶ = 811274437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811339979) 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, 17637803 + ... + 17637848.

It is an arithmetic number, because the mean of its divisors is an integer number (211653912).

Almost surely, 2^811339973 is an apocalyptic number.

It is an amenable number.

811339973 is a deficient number, since it is larger than the sum of its proper divisors (35275675).

811339973 is a wasteful number, since it uses less digits than its factorization.

811339973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35275674.

The product of its digits is 122472, while the sum is 44.

The square root of 811339973 is about 28484.0301397116. The cubic root of 811339973 is about 932.6834942350.

The spelling of 811339973 in words is "eight hundred eleven million, three hundred thirty-nine thousand, nine hundred seventy-three".