520297907 has 4 divisors (see below), whose sum is σ = 521870136. Its totient is φ = 518725680.

The previous prime is 520297889. The next prime is 520297909. The reversal of 520297907 is 709792025.

It is a happy number.

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 520297907 - 2²⁰ = 519249331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520297909) 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, 785618 + ... + 786279.

It is an arithmetic number, because the mean of its divisors is an integer number (130467534).

Almost surely, 2^520297907 is an apocalyptic number.

520297907 is a deficient number, since it is larger than the sum of its proper divisors (1572229).

520297907 is a wasteful number, since it uses less digits than its factorization.

520297907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572228.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 520297907 is about 22810.0396097859. The cubic root of 520297907 is about 804.2986868052.

The spelling of 520297907 in words is "five hundred twenty million, two hundred ninety-seven thousand, nine hundred seven".