11161823 has 4 divisors (see below), whose sum is σ = 11218680. Its totient is φ = 11104968.

The previous prime is 11161807. The next prime is 11161847. The reversal of 11161823 is 32816111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32816111 = 443 ⋅74077.

It is a cyclic number.

It is not a de Polignac number, because 11161823 - 2⁴ = 11161807 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 (11161523) 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, 28133 + ... + 28526.

It is an arithmetic number, because the mean of its divisors is an integer number (2804670).

Almost surely, 2^11161823 is an apocalyptic number.

11161823 is a deficient number, since it is larger than the sum of its proper divisors (56857).

11161823 is an equidigital number, since it uses as much as digits as its factorization.

11161823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56856.

The product of its digits is 288, while the sum is 23.

The square root of 11161823 is about 3340.9314569443. The cubic root of 11161823 is about 223.4832836201.

Adding to 11161823 its reverse (32816111), we get a palindrome (43977934).

The spelling of 11161823 in words is "eleven million, one hundred sixty-one thousand, eight hundred twenty-three".