11685613 has 4 divisors (see below), whose sum is σ = 12373020. Its totient is φ = 10998208.

The previous prime is 11685607. The next prime is 11685617. The reversal of 11685613 is 31658611.

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 5116644 + 6568969 = 2262^2 + 2563^2 .

It is a cyclic number.

It is not a de Polignac number, because 11685613 - 2⁵ = 11685581 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 (11685617) 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, 343678 + ... + 343711.

It is an arithmetic number, because the mean of its divisors is an integer number (3093255).

Almost surely, 2^11685613 is an apocalyptic number.

It is an amenable number.

11685613 is a deficient number, since it is larger than the sum of its proper divisors (687407).

11685613 is an equidigital number, since it uses as much as digits as its factorization.

11685613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687406.

The product of its digits is 4320, while the sum is 31.

The square root of 11685613 is about 3418.4225894409. The cubic root of 11685613 is about 226.9257780334.

The spelling of 11685613 in words is "eleven million, six hundred eighty-five thousand, six hundred thirteen".