520839297 has 18 divisors (see below), whose sum is σ = 826935746. Its totient is φ = 315659520.

The previous prime is 520839287. The next prime is 520839323. The reversal of 520839297 is 792938025.

520839297 is a `hidden beast` number, since 520 + 8 + 39 + 2 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 370139121 + 150700176 = 19239^2 + 12276^2 .

It is not a de Polignac number, because 520839297 - 2⁶ = 520839233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520839287) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 238048 + ... + 240225.

Almost surely, 2^520839297 is an apocalyptic number.

It is an amenable number.

520839297 is a deficient number, since it is larger than the sum of its proper divisors (306096449).

520839297 is a wasteful number, since it uses less digits than its factorization.

520839297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478301 (or 478287 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 520839297 is about 22821.9038863983. The cubic root of 520839297 is about 804.5775580166.

The spelling of 520839297 in words is "five hundred twenty million, eight hundred thirty-nine thousand, two hundred ninety-seven".