11789009 has 4 divisors (see below), whose sum is σ = 12063216. Its totient is φ = 11514804.

The previous prime is 11789003. The next prime is 11789027. The reversal of 11789009 is 90098711.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90098711 = 191 ⋅471721.

It is a cyclic number.

It is not a de Polignac number, because 11789009 - 2⁸ = 11788753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11789009.

It is not an unprimeable number, because it can be changed into a prime (11789003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137039 + ... + 137124.

It is an arithmetic number, because the mean of its divisors is an integer number (3015804).

Almost surely, 2^11789009 is an apocalyptic number.

It is an amenable number.

11789009 is a deficient number, since it is larger than the sum of its proper divisors (274207).

11789009 is an equidigital number, since it uses as much as digits as its factorization.

11789009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274206.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 11789009 is about 3433.5126328587. The cubic root of 11789009 is about 227.5931044269.

The spelling of 11789009 in words is "eleven million, seven hundred eighty-nine thousand, nine".