520064091 has 16 divisors (see below), whose sum is σ = 795320320. Its totient is φ = 335524680.

The previous prime is 520064033. The next prime is 520064093. The reversal of 520064091 is 190460025.

It is not a de Polignac number, because 520064091 - 2¹¹ = 520062043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520064093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309835 + ... + 311508.

It is an arithmetic number, because the mean of its divisors is an integer number (49707520).

Almost surely, 2^520064091 is an apocalyptic number.

520064091 is a deficient number, since it is larger than the sum of its proper divisors (275256229).

520064091 is a wasteful number, since it uses less digits than its factorization.

520064091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621383 (or 621377 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 520064091 is about 22804.9137468222. The cubic root of 520064091 is about 804.1781878394.

The spelling of 520064091 in words is "five hundred twenty million, sixty-four thousand, ninety-one".