520578959 has 4 divisors (see below), whose sum is σ = 520723320. Its totient is φ = 520434600.

The previous prime is 520578917. The next prime is 520578983. The reversal of 520578959 is 959875025.

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 520578959 - 2⁸ = 520578703 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 (520572959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66629 + ... + 74030.

It is an arithmetic number, because the mean of its divisors is an integer number (130180830).

Almost surely, 2^520578959 is an apocalyptic number.

520578959 is a deficient number, since it is larger than the sum of its proper divisors (144361).

520578959 is a wasteful number, since it uses less digits than its factorization.

520578959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144360.

The product of its (nonzero) digits is 1134000, while the sum is 50.

The square root of 520578959 is about 22816.1994863299. The cubic root of 520578959 is about 804.4434814581.

It can be divided in two parts, 52057 and 8959, that added together give a palindrome (61016).

The spelling of 520578959 in words is "five hundred twenty million, five hundred seventy-eight thousand, nine hundred fifty-nine".