2081839 has 4 divisors (see below), whose sum is σ = 2091160. Its totient is φ = 2072520.

The previous prime is 2081831. The next prime is 2081843. The reversal of 2081839 is 9381802.

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 2081839 - 2³ = 2081831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2081839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081831) 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, 4317 + ... + 4774.

It is an arithmetic number, because the mean of its divisors is an integer number (522790).

2^2081839 is an apocalyptic number.

2081839 is a deficient number, since it is larger than the sum of its proper divisors (9321).

2081839 is an equidigital number, since it uses as much as digits as its factorization.

2081839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9320.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 2081839 is about 1442.8579278640. The cubic root of 2081839 is about 127.6876948488.

The spelling of 2081839 in words is "two million, eighty-one thousand, eight hundred thirty-nine".