11523791 has 4 divisors (see below), whose sum is σ = 11530584. Its totient is φ = 11517000.

The previous prime is 11523781. The next prime is 11523833. The reversal of 11523791 is 19732511.

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 a de Polignac number, because none of the positive numbers 2^k-11523791 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 (11523731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1556 + ... + 5046.

It is an arithmetic number, because the mean of its divisors is an integer number (2882646).

Almost surely, 2^11523791 is an apocalyptic number.

11523791 is a deficient number, since it is larger than the sum of its proper divisors (6793).

11523791 is an equidigital number, since it uses as much as digits as its factorization.

11523791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6792.

The product of its digits is 1890, while the sum is 29.

The square root of 11523791 is about 3394.6709708011. The cubic root of 11523791 is about 225.8734182948.

The spelling of 11523791 in words is "eleven million, five hundred twenty-three thousand, seven hundred ninety-one".