520129905 has 16 divisors (see below), whose sum is σ = 854700864. Its totient is φ = 269904960.

The previous prime is 520129829. The next prime is 520129913. The reversal of 520129905 is 509921025.

It is not a de Polignac number, because 520129905 - 2¹¹ = 520127857 is a prime.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 468031 + ... + 469140.

It is an arithmetic number, because the mean of its divisors is an integer number (53418804).

Almost surely, 2^520129905 is an apocalyptic number.

It is an amenable number.

520129905 is a deficient number, since it is larger than the sum of its proper divisors (334570959).

520129905 is a wasteful number, since it uses less digits than its factorization.

520129905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937216.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 520129905 is about 22806.3566796628. The cubic root of 520129905 is about 804.2121092680.

The spelling of 520129905 in words is "five hundred twenty million, one hundred twenty-nine thousand, nine hundred five".