11181413 has 4 divisors (see below), whose sum is σ = 11189100. Its totient is φ = 11173728.

The previous prime is 11181409. The next prime is 11181431. The reversal of 11181413 is 31418111.

It is a happy number.

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 can be written as a sum of positive squares in 2 ways, for example, as 3602404 + 7579009 = 1898^2 + 2753^2 .

It is a cyclic number.

It is not a de Polignac number, because 11181413 - 2² = 11181409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11181403) 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, 920 + ... + 4817.

It is an arithmetic number, because the mean of its divisors is an integer number (2797275).

Almost surely, 2^11181413 is an apocalyptic number.

It is an amenable number.

11181413 is a deficient number, since it is larger than the sum of its proper divisors (7687).

11181413 is an equidigital number, since it uses as much as digits as its factorization.

11181413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7686.

The product of its digits is 96, while the sum is 20.

The square root of 11181413 is about 3343.8619887788. The cubic root of 11181413 is about 223.6139516044.

Adding to 11181413 its reverse (31418111), we get a palindrome (42599524).

The spelling of 11181413 in words is "eleven million, one hundred eighty-one thousand, four hundred thirteen".