11803811 has 4 divisors (see below), whose sum is σ = 11811000. Its totient is φ = 11796624.

The previous prime is 11803793. The next prime is 11803817. The reversal of 11803811 is 11830811.

11803811 is digitally balanced in base 3, 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 brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 11830811 = 29 ⋅407959.

It is a cyclic number.

It is not a de Polignac number, because 11803811 - 2¹⁸ = 11541667 is a prime.

It is a super-3 number, since 3×11803811³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11803817) 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, 215 + ... + 4863.

It is an arithmetic number, because the mean of its divisors is an integer number (2952750).

Almost surely, 2^11803811 is an apocalyptic number.

11803811 is a deficient number, since it is larger than the sum of its proper divisors (7189).

11803811 is an equidigital number, since it uses as much as digits as its factorization.

11803811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7188.

The product of its (nonzero) digits is 192, while the sum is 23.

The square root of 11803811 is about 3435.6674751786. The cubic root of 11803811 is about 227.6883180894.

Subtracting 11803811 from its reverse (11830811), we obtain a cube (27000 = 30³).

The spelling of 11803811 in words is "eleven million, eight hundred three thousand, eight hundred eleven".