11711691 has 24 divisors (see below), whose sum is σ = 18358704. Its totient is φ = 7165440.

The previous prime is 11711639. The next prime is 11711699. The reversal of 11711691 is 19611711.

It is not a de Polignac number, because 11711691 - 2⁶ = 11711627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11711699) 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 23 ways as a sum of consecutive naturals, for example, 5340 + ... + 7206.

It is an arithmetic number, because the mean of its divisors is an integer number (764946).

Almost surely, 2^11711691 is an apocalyptic number.

11711691 is a deficient number, since it is larger than the sum of its proper divisors (6647013).

11711691 is a wasteful number, since it uses less digits than its factorization.

11711691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1931 (or 1928 counting only the distinct ones).

The product of its digits is 378, while the sum is 27.

The square root of 11711691 is about 3422.2347961529. The cubic root of 11711691 is about 227.0944576394.

The spelling of 11711691 in words is "eleven million, seven hundred eleven thousand, six hundred ninety-one".