11681583 has 4 divisors (see below), whose sum is σ = 15575448. Its totient is φ = 7787720.

The previous prime is 11681569. The next prime is 11681609. The reversal of 11681583 is 38518611.

11681583 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 38518611 = 3 ⋅12839537.

It is a cyclic number.

It is not a de Polignac number, because 11681583 - 2²¹ = 9584431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11681543) 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, 1946928 + ... + 1946933.

It is an arithmetic number, because the mean of its divisors is an integer number (3893862).

Almost surely, 2^11681583 is an apocalyptic number.

11681583 is a deficient number, since it is larger than the sum of its proper divisors (3893865).

11681583 is an equidigital number, since it uses as much as digits as its factorization.

11681583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3893864.

The product of its digits is 5760, while the sum is 33.

The square root of 11681583 is about 3417.8330854505. The cubic root of 11681583 is about 226.8996885153.

The spelling of 11681583 in words is "eleven million, six hundred eighty-one thousand, five hundred eighty-three".