11813617 has 4 divisors (see below), whose sum is σ = 12101796. Its totient is φ = 11525440.

The previous prime is 11813609. The next prime is 11813621. The reversal of 11813617 is 71631811.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6574096 + 5239521 = 2564^2 + 2289^2 .

It is a cyclic number.

It is not a de Polignac number, because 11813617 - 2³ = 11813609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11813677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144028 + ... + 144109.

It is an arithmetic number, because the mean of its divisors is an integer number (3025449).

Almost surely, 2^11813617 is an apocalyptic number.

It is an amenable number.

11813617 is a deficient number, since it is larger than the sum of its proper divisors (288179).

11813617 is an equidigital number, since it uses as much as digits as its factorization.

11813617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288178.

The product of its digits is 1008, while the sum is 28.

The square root of 11813617 is about 3437.0942669645. The cubic root of 11813617 is about 227.7513512250.

The spelling of 11813617 in words is "eleven million, eight hundred thirteen thousand, six hundred seventeen".