520549589 has 6 divisors (see below), whose sum is σ = 605537334. Its totient is φ = 446185320.

The previous prime is 520549583. The next prime is 520549597. The reversal of 520549589 is 985945025.

It can be written as a sum of positive squares in only one way, i.e., 469068964 + 51480625 = 21658^2 + 7175^2 .

It is a de Polignac number, because none of the positive numbers 2^k-520549589 is a prime.

It is a super-4 number, since 4×520549589⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520549583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5311682 + ... + 5311779.

It is an arithmetic number, because the mean of its divisors is an integer number (100922889).

Almost surely, 2^520549589 is an apocalyptic number.

It is an amenable number.

520549589 is a deficient number, since it is larger than the sum of its proper divisors (84987745).

520549589 is a wasteful number, since it uses less digits than its factorization.

520549589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10623475 (or 10623468 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 47.

The square root of 520549589 is about 22815.5558555999. Note that the first 3 decimals coincide. The cubic root of 520549589 is about 804.4283528217.

The spelling of 520549589 in words is "five hundred twenty million, five hundred forty-nine thousand, five hundred eighty-nine".