11109823 has 4 divisors (see below), whose sum is σ = 11763360. Its totient is φ = 10456288.

The previous prime is 11109817. The next prime is 11109827. The reversal of 11109823 is 32890111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11109823 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 (11109827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326743 + ... + 326776.

It is an arithmetic number, because the mean of its divisors is an integer number (2940840).

Almost surely, 2^11109823 is an apocalyptic number.

11109823 is a deficient number, since it is larger than the sum of its proper divisors (653537).

11109823 is an equidigital number, since it uses as much as digits as its factorization.

11109823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653536.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 11109823 is about 3333.1401110664. The cubic root of 11109823 is about 223.1356933206.

Adding to 11109823 its reverse (32890111), we get a palindrome (43999934).

The spelling of 11109823 in words is "eleven million, one hundred nine thousand, eight hundred twenty-three".