2005789 has 2 divisors, whose sum is σ = 2005790. Its totient is φ = 2005788.

The previous prime is 2005777. The next prime is 2005799. The reversal of 2005789 is 9875002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1988100 + 17689 = 1410^2 + 133^2 .

It is a cyclic number.

It is not a de Polignac number, because 2005789 - 2⁹ = 2005277 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2005789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2005739) 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 as a sum of consecutive naturals, namely, 1002894 + 1002895.

It is an arithmetic number, because the mean of its divisors is an integer number (1002895).

2^2005789 is an apocalyptic number.

It is an amenable number.

2005789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2005789 is an equidigital number, since it uses as much as digits as its factorization.

2005789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 2005789 is about 1416.2588040327. The cubic root of 2005789 is about 126.1135492739.

The spelling of 2005789 in words is "two million, five thousand, seven hundred eighty-nine".