11731689 has 16 divisors (see below), whose sum is σ = 17980800. Its totient is φ = 7550928.

The previous prime is 11731667. The next prime is 11731691. The reversal of 11731689 is 98613711.

It is a de Polignac number, because none of the positive numbers 2^k-11731689 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11731589) 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 15 ways as a sum of consecutive naturals, for example, 6709 + ... + 8274.

It is an arithmetic number, because the mean of its divisors is an integer number (1123800).

Almost surely, 2^11731689 is an apocalyptic number.

It is an amenable number.

11731689 is a deficient number, since it is larger than the sum of its proper divisors (6249111).

11731689 is a wasteful number, since it uses less digits than its factorization.

11731689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15021 (or 15015 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 11731689 is about 3425.1553249451. The cubic root of 11731689 is about 227.2236405941.

The spelling of 11731689 in words is "eleven million, seven hundred thirty-one thousand, six hundred eighty-nine".