11716805 has 4 divisors (see below), whose sum is σ = 14060172. Its totient is φ = 9373440.

The previous prime is 11716801. The next prime is 11716807. The reversal of 11716805 is 50861711.

11716805 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 6180196 + 5536609 = 2486^2 + 2353^2 .

It is not a de Polignac number, because 11716805 - 2² = 11716801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11716801) 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, 1171676 + ... + 1171685.

It is an arithmetic number, because the mean of its divisors is an integer number (3515043).

Almost surely, 2^11716805 is an apocalyptic number.

It is an amenable number.

11716805 is a deficient number, since it is larger than the sum of its proper divisors (2343367).

11716805 is an equidigital number, since it uses as much as digits as its factorization.

11716805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2343366.

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 11716805 is about 3422.9818871855. The cubic root of 11716805 is about 227.1275070103.

It can be divided in two parts, 11716 and 805, that added together give a palindrome (12521).

The spelling of 11716805 in words is "eleven million, seven hundred sixteen thousand, eight hundred five".