11716991 has 8 divisors (see below), whose sum is σ = 13765584. Its totient is φ = 9832320.

The previous prime is 11716981. The next prime is 11716993. The reversal of 11716991 is 19961711.

11716991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 11716991 - 2¹⁰ = 11715967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11716993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40826 + ... + 41111.

It is an arithmetic number, because the mean of its divisors is an integer number (1720698).

Almost surely, 2^11716991 is an apocalyptic number.

11716991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11716991 is a deficient number, since it is larger than the sum of its proper divisors (2048593).

11716991 is a wasteful number, since it uses less digits than its factorization.

11716991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81961.

The product of its digits is 3402, while the sum is 35.

The square root of 11716991 is about 3423.0090563713. The cubic root of 11716991 is about 227.1287088594.

The spelling of 11716991 in words is "eleven million, seven hundred sixteen thousand, nine hundred ninety-one".