813173205 has 16 divisors (see below), whose sum is σ = 1401160320. Its totient is φ = 400331328.

The previous prime is 813173201. The next prime is 813173219. The reversal of 813173205 is 502371318.

It is not a de Polignac number, because 813173205 - 2² = 813173201 is a prime.

It is a super-2 number, since 2×813173205² = 1322501322659944050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813173201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2084865 + ... + 2085254.

It is an arithmetic number, because the mean of its divisors is an integer number (87572520).

Almost surely, 2^813173205 is an apocalyptic number.

It is an amenable number.

813173205 is a deficient number, since it is larger than the sum of its proper divisors (587987115).

813173205 is a wasteful number, since it uses less digits than its factorization.

813173205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170140.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 813173205 is about 28516.1919792949. The cubic root of 813173205 is about 933.3854355126.

The spelling of 813173205 in words is "eight hundred thirteen million, one hundred seventy-three thousand, two hundred five".