520064999 has 4 divisors (see below), whose sum is σ = 528879720. Its totient is φ = 511250280.

The previous prime is 520064911. The next prime is 520065023. The reversal of 520064999 is 999460025.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 520064999 - 2²⁰ = 519016423 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 (520064899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4407272 + ... + 4407389.

It is an arithmetic number, because the mean of its divisors is an integer number (132219930).

Almost surely, 2^520064999 is an apocalyptic number.

520064999 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

520064999 is a deficient number, since it is larger than the sum of its proper divisors (8814721).

520064999 is an equidigital number, since it uses as much as digits as its factorization.

520064999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8814720.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 520064999 is about 22804.9336548037. The cubic root of 520064999 is about 804.1786558544.

The spelling of 520064999 in words is "five hundred twenty million, sixty-four thousand, nine hundred ninety-nine".