520005789 has 6 divisors (see below), whose sum is σ = 751119486. Its totient is φ = 346670520.

The previous prime is 520005743. The next prime is 520005799. The reversal of 520005789 is 987500025.

520005789 is a `hidden beast` number, since 520 + 0 + 0 + 57 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 333683289 + 186322500 = 18267^2 + 13650^2 .

It is not a de Polignac number, because 520005789 - 2²¹ = 517908637 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520005719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28889202 + ... + 28889219.

It is an arithmetic number, because the mean of its divisors is an integer number (125186581).

Almost surely, 2^520005789 is an apocalyptic number.

It is an amenable number.

520005789 is a deficient number, since it is larger than the sum of its proper divisors (231113697).

520005789 is a wasteful number, since it uses less digits than its factorization.

520005789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57778427 (or 57778424 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 520005789 is about 22803.6354338513. The cubic root of 520005789 is about 804.1481358069.

The spelling of 520005789 in words is "five hundred twenty million, five thousand, seven hundred eighty-nine".