11618809 has 4 divisors (see below), whose sum is σ = 11727504. Its totient is φ = 11510116.

The previous prime is 11618807. The next prime is 11618839. The reversal of 11618809 is 90881611.

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 11618809 - 2¹ = 11618807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11618801) 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, 54187 + ... + 54400.

It is an arithmetic number, because the mean of its divisors is an integer number (2931876).

Almost surely, 2^11618809 is an apocalyptic number.

It is an amenable number.

11618809 is a deficient number, since it is larger than the sum of its proper divisors (108695).

11618809 is a wasteful number, since it uses less digits than its factorization.

11618809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108694.

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 11618809 is about 3408.6374110486. The cubic root of 11618809 is about 226.4925236354.

The spelling of 11618809 in words is "eleven million, six hundred eighteen thousand, eight hundred nine".