185045813 has 4 divisors (see below), whose sum is σ = 189349248. Its totient is φ = 180742380.

The previous prime is 185045801. The next prime is 185045831. The reversal of 185045813 is 318540581.

185045813 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, 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 185045813 - 2⁴ = 185045797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185048813) 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, 2151653 + ... + 2151738.

It is an arithmetic number, because the mean of its divisors is an integer number (47337312).

Almost surely, 2^185045813 is an apocalyptic number.

It is an amenable number.

185045813 is a deficient number, since it is larger than the sum of its proper divisors (4303435).

185045813 is an equidigital number, since it uses as much as digits as its factorization.

185045813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4303434.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 185045813 is about 13603.1545238595. The cubic root of 185045813 is about 569.8489524871.

The spelling of 185045813 in words is "one hundred eighty-five million, forty-five thousand, eight hundred thirteen".