11582991 has 24 divisors (see below), whose sum is σ = 19487520. Its totient is φ = 6492096.

The previous prime is 11582981. The next prime is 11582993. The reversal of 11582991 is 19928511.

11582991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11582991 - 2⁶ = 11582927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11582993) 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, 1605 + ... + 5073.

It is an arithmetic number, because the mean of its divisors is an integer number (811980).

Almost surely, 2^11582991 is an apocalyptic number.

11582991 is a deficient number, since it is larger than the sum of its proper divisors (7904529).

11582991 is a wasteful number, since it uses less digits than its factorization.

11582991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3535 (or 3532 counting only the distinct ones).

The product of its digits is 6480, while the sum is 36.

The square root of 11582991 is about 3403.3793499991. The cubic root of 11582991 is about 226.2595433639.

The spelling of 11582991 in words is "eleven million, five hundred eighty-two thousand, nine hundred ninety-one".