11804813 has 4 divisors (see below), whose sum is σ = 12123900. Its totient is φ = 11485728.

The previous prime is 11804801. The next prime is 11804839. The reversal of 11804813 is 31840811.

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 8168164 + 3636649 = 2858^2 + 1907^2 .

It is a cyclic number.

It is not a de Polignac number, because 11804813 - 2⁸ = 11804557 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 (11804113) 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, 159488 + ... + 159561.

It is an arithmetic number, because the mean of its divisors is an integer number (3030975).

Almost surely, 2^11804813 is an apocalyptic number.

It is an amenable number.

11804813 is a deficient number, since it is larger than the sum of its proper divisors (319087).

11804813 is an equidigital number, since it uses as much as digits as its factorization.

11804813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319086.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 11804813 is about 3435.8132952767. The cubic root of 11804813 is about 227.6947605635.

The spelling of 11804813 in words is "eleven million, eight hundred four thousand, eight hundred thirteen".