520678897 has 2 divisors, whose sum is σ = 520678898. Its totient is φ = 520678896.

The previous prime is 520678891. The next prime is 520678901. The reversal of 520678897 is 798876025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 408403681 + 112275216 = 20209^2 + 10596^2 .

It is a cyclic number.

It is not a de Polignac number, because 520678897 - 2³ = 520678889 is a prime.

It is a super-2 number, since 2×520678897² = 542213027562273218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (520678891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260339448 + 260339449.

It is an arithmetic number, because the mean of its divisors is an integer number (260339449).

Almost surely, 2^520678897 is an apocalyptic number.

It is an amenable number.

520678897 is a deficient number, since it is larger than the sum of its proper divisors (1).

520678897 is an equidigital number, since it uses as much as digits as its factorization.

520678897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The square root of 520678897 is about 22818.3894479869. The cubic root of 520678897 is about 804.4949557685.

The spelling of 520678897 in words is "five hundred twenty million, six hundred seventy-eight thousand, eight hundred ninety-seven".