813579055 has 4 divisors (see below), whose sum is σ = 976294872. Its totient is φ = 650863240.

The previous prime is 813579043. The next prime is 813579089. The reversal of 813579055 is 550975318.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 813579055 - 2⁹ = 813578543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81357901 + ... + 81357910.

It is an arithmetic number, because the mean of its divisors is an integer number (244073718).

Almost surely, 2^813579055 is an apocalyptic number.

813579055 is a deficient number, since it is larger than the sum of its proper divisors (162715817).

813579055 is a wasteful number, since it uses less digits than its factorization.

813579055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162715816.

The product of its (nonzero) digits is 189000, while the sum is 43.

The square root of 813579055 is about 28523.3072240931. The cubic root of 813579055 is about 933.5406920938.

The spelling of 813579055 in words is "eight hundred thirteen million, five hundred seventy-nine thousand, fifty-five".