11689831 has 4 divisors (see below), whose sum is σ = 11696872. Its totient is φ = 11682792.

The previous prime is 11689801. The next prime is 11689837. The reversal of 11689831 is 13898611.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11689831 - 2⁷ = 11689703 is a prime.

It is a super-2 number, since 2×11689831² = 273304297617122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11689837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505 + ... + 4861.

It is an arithmetic number, because the mean of its divisors is an integer number (2924218).

Almost surely, 2^11689831 is an apocalyptic number.

11689831 is a deficient number, since it is larger than the sum of its proper divisors (7041).

11689831 is an equidigital number, since it uses as much as digits as its factorization.

11689831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7040.

The product of its digits is 10368, while the sum is 37.

The square root of 11689831 is about 3419.0394850016. The cubic root of 11689831 is about 226.9530782069.

The spelling of 11689831 in words is "eleven million, six hundred eighty-nine thousand, eight hundred thirty-one".