2081783 has 4 divisors (see below), whose sum is σ = 2271048. Its totient is φ = 1892520.

The previous prime is 2081777. The next prime is 2081797. The reversal of 2081783 is 3871802.

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 2081783 - 2⁶ = 2081719 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 (2081383) 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, 94616 + ... + 94637.

It is an arithmetic number, because the mean of its divisors is an integer number (567762).

2^2081783 is an apocalyptic number.

2081783 is a deficient number, since it is larger than the sum of its proper divisors (189265).

2081783 is a wasteful number, since it uses less digits than its factorization.

2081783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189264.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 2081783 is about 1442.8385218035. The cubic root of 2081783 is about 127.6865499356.

It can be divided in two parts, 208 and 1783, that added together give a palindrome (1991).

The spelling of 2081783 in words is "two million, eighty-one thousand, seven hundred eighty-three".