11813611 has 4 divisors (see below), whose sum is σ = 12435400. Its totient is φ = 11191824.

The previous prime is 11813609. The next prime is 11813621. The reversal of 11813611 is 11631811.

11813611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 11813611 - 2¹ = 11813609 is a prime.

It is a super-2 number, since 2×11813611² = 279122809718642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11813621) 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, 310866 + ... + 310903.

It is an arithmetic number, because the mean of its divisors is an integer number (3108850).

Almost surely, 2^11813611 is an apocalyptic number.

11813611 is a deficient number, since it is larger than the sum of its proper divisors (621789).

11813611 is an equidigital number, since it uses as much as digits as its factorization.

11813611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621788.

The product of its digits is 144, while the sum is 22.

The square root of 11813611 is about 3437.0933941341. The cubic root of 11813611 is about 227.7513126676.

The spelling of 11813611 in words is "eleven million, eight hundred thirteen thousand, six hundred eleven".