11766409 has 4 divisors (see below), whose sum is σ = 12278016. Its totient is φ = 11254804.

The previous prime is 11766401. The next prime is 11766413. The reversal of 11766409 is 90466711.

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 11766409 - 2³ = 11766401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11766401) 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, 255769 + ... + 255814.

It is an arithmetic number, because the mean of its divisors is an integer number (3069504).

Almost surely, 2^11766409 is an apocalyptic number.

It is an amenable number.

11766409 is a deficient number, since it is larger than the sum of its proper divisors (511607).

11766409 is an equidigital number, since it uses as much as digits as its factorization.

11766409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511606.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 11766409 is about 3430.2199637924. The cubic root of 11766409 is about 227.4475763763.

The spelling of 11766409 in words is "eleven million, seven hundred sixty-six thousand, four hundred nine".