11190805 has 4 divisors (see below), whose sum is σ = 13428972. Its totient is φ = 8952640.

The previous prime is 11190799. The next prime is 11190821. The reversal of 11190805 is 50809111.

11190805 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.

It can be written as a sum of positive squares in 2 ways, for example, as 8608356 + 2582449 = 2934^2 + 1607^2 .

It is not a de Polignac number, because 11190805 - 2⁹ = 11190293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11190805.

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, 1119076 + ... + 1119085.

It is an arithmetic number, because the mean of its divisors is an integer number (3357243).

Almost surely, 2^11190805 is an apocalyptic number.

It is an amenable number.

11190805 is a deficient number, since it is larger than the sum of its proper divisors (2238167).

11190805 is an equidigital number, since it uses as much as digits as its factorization.

11190805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238166.

The product of its (nonzero) digits is 360, while the sum is 25.

The square root of 11190805 is about 3345.2660581783. The cubic root of 11190805 is about 223.6765434099.

Adding to 11190805 its reverse (50809111), we get a palindrome (61999916).

The spelling of 11190805 in words is "eleven million, one hundred ninety thousand, eight hundred five".