520289109 has 8 divisors (see below), whose sum is σ = 770798720. Its totient is φ = 346859388.

The previous prime is 520289071. The next prime is 520289113. The reversal of 520289109 is 901982025.

520289109 is a `hidden beast` number, since 520 + 28 + 9 + 109 = 666.

It is not a de Polignac number, because 520289109 - 2⁷ = 520288981 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 (520289009) 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 7 ways as a sum of consecutive naturals, for example, 9634957 + ... + 9635010.

It is an arithmetic number, because the mean of its divisors is an integer number (96349840).

Almost surely, 2^520289109 is an apocalyptic number.

It is an amenable number.

520289109 is a deficient number, since it is larger than the sum of its proper divisors (250509611).

520289109 is a wasteful number, since it uses less digits than its factorization.

520289109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19269976 (or 19269970 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 520289109 is about 22809.8467552941. The cubic root of 520289109 is about 804.2941533385.

The spelling of 520289109 in words is "five hundred twenty million, two hundred eighty-nine thousand, one hundred nine".