520332009 has 4 divisors (see below), whose sum is σ = 693776016. Its totient is φ = 346888004.

The previous prime is 520331951. The next prime is 520332017. The reversal of 520332009 is 900233025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 520332009 - 2⁷ = 520331881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520332009.

It is not an unprimeable number, because it can be changed into a prime (520332079) 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, 86721999 + ... + 86722004.

It is an arithmetic number, because the mean of its divisors is an integer number (173444004).

Almost surely, 2^520332009 is an apocalyptic number.

It is an amenable number.

520332009 is a deficient number, since it is larger than the sum of its proper divisors (173444007).

520332009 is a wasteful number, since it uses less digits than its factorization.

520332009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173444006.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 520332009 is about 22810.7871192557. The cubic root of 520332009 is about 804.3162585298.

The spelling of 520332009 in words is "five hundred twenty million, three hundred thirty-two thousand, nine".