11820583 has 4 divisors (see below), whose sum is σ = 11827480. Its totient is φ = 11813688.

The previous prime is 11820581. The next prime is 11820607. The reversal of 11820583 is 38502811.

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 is a cyclic number.

It is not a de Polignac number, because 11820583 - 2¹ = 11820581 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 (11820581) 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, 1333 + ... + 5041.

It is an arithmetic number, because the mean of its divisors is an integer number (2956870).

Almost surely, 2^11820583 is an apocalyptic number.

11820583 is a deficient number, since it is larger than the sum of its proper divisors (6897).

11820583 is an equidigital number, since it uses as much as digits as its factorization.

11820583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6896.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 11820583 is about 3438.1074735965. The cubic root of 11820583 is about 227.7961076046.

It can be divided in two parts, 11820 and 583, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 11820583 in words is "eleven million, eight hundred twenty thousand, five hundred eighty-three".