11561889 has 8 divisors (see below), whose sum is σ = 15474240. Its totient is φ = 7678736.

The previous prime is 11561863. The next prime is 11561903. The reversal of 11561889 is 98816511.

11561889 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11561889 - 2¹¹ = 11559841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11561839) 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 7 ways as a sum of consecutive naturals, for example, 6357 + ... + 7970.

It is an arithmetic number, because the mean of its divisors is an integer number (1934280).

Almost surely, 2^11561889 is an apocalyptic number.

It is an amenable number.

11561889 is a deficient number, since it is larger than the sum of its proper divisors (3912351).

11561889 is a wasteful number, since it uses less digits than its factorization.

11561889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14599.

The product of its digits is 17280, while the sum is 39.

The square root of 11561889 is about 3400.2777827701. The cubic root of 11561889 is about 226.1220592648.

The spelling of 11561889 in words is "eleven million, five hundred sixty-one thousand, eight hundred eighty-nine".