11113591 has 4 divisors (see below), whose sum is σ = 11156112. Its totient is φ = 11071072.

The previous prime is 11113589. The next prime is 11113603. The reversal of 11113591 is 19531111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19531111 = 311 ⋅62801.

It is a cyclic number.

It is not a de Polignac number, because 11113591 - 2¹ = 11113589 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 (11113561) 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 3 ways as a sum of consecutive naturals, for example, 20866 + ... + 21391.

It is an arithmetic number, because the mean of its divisors is an integer number (2789028).

Almost surely, 2^11113591 is an apocalyptic number.

11113591 is a deficient number, since it is larger than the sum of its proper divisors (42521).

11113591 is an equidigital number, since it uses as much as digits as its factorization.

11113591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42520.

The product of its digits is 135, while the sum is 22.

The square root of 11113591 is about 3333.7052959132. The cubic root of 11113591 is about 223.1609166525.

The spelling of 11113591 in words is "eleven million, one hundred thirteen thousand, five hundred ninety-one".