11995689 has 8 divisors (see below), whose sum is σ = 16149952. Its totient is φ = 7919280.

The previous prime is 11995661. The next prime is 11995691. The reversal of 11995689 is 98659911.

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

It is not a de Polignac number, because 11995689 - 2²⁰ = 10947113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11995619) 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, 19102 + ... + 19719.

It is an arithmetic number, because the mean of its divisors is an integer number (2018744).

Almost surely, 2^11995689 is an apocalyptic number.

It is an amenable number.

11995689 is a deficient number, since it is larger than the sum of its proper divisors (4154263).

11995689 is a wasteful number, since it uses less digits than its factorization.

11995689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38927.

The product of its digits is 174960, while the sum is 48.

The square root of 11995689 is about 3463.4793199902. The cubic root of 11995689 is about 228.9154293208.

The spelling of 11995689 in words is "eleven million, nine hundred ninety-five thousand, six hundred eighty-nine".