11686861 has 8 divisors (see below), whose sum is σ = 11871360. Its totient is φ = 11503968.

The previous prime is 11686859. The next prime is 11686867. The reversal of 11686861 is 16868611.

It is a happy number.

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 11686861 - 2¹ = 11686859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11686861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11686867) 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 7 ways as a sum of consecutive naturals, for example, 25345 + ... + 25801.

It is an arithmetic number, because the mean of its divisors is an integer number (1483920).

Almost surely, 2^11686861 is an apocalyptic number.

It is an amenable number.

11686861 is a deficient number, since it is larger than the sum of its proper divisors (184499).

11686861 is a wasteful number, since it uses less digits than its factorization.

11686861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803.

The product of its digits is 13824, while the sum is 37.

The square root of 11686861 is about 3418.6051249011. The cubic root of 11686861 is about 226.9338561516.

The spelling of 11686861 in words is "eleven million, six hundred eighty-six thousand, eight hundred sixty-one".