520678901 has 2 divisors, whose sum is σ = 520678902. Its totient is φ = 520678900.

The previous prime is 520678897. The next prime is 520678913. The reversal of 520678901 is 109876025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 425596900 + 95082001 = 20630^2 + 9751^2 .

It is a cyclic number.

It is not a de Polignac number, because 520678901 - 2² = 520678897 is a prime.

It is a super-2 number, since 2×520678901² = 542213035893135602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520674901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260339450 + 260339451.

It is an arithmetic number, because the mean of its divisors is an integer number (260339451).

Almost surely, 2^520678901 is an apocalyptic number.

It is an amenable number.

520678901 is a deficient number, since it is larger than the sum of its proper divisors (1).

520678901 is an equidigital number, since it uses as much as digits as its factorization.

520678901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 520678901 is about 22818.3895356355. The cubic root of 520678901 is about 804.4949578286.

The spelling of 520678901 in words is "five hundred twenty million, six hundred seventy-eight thousand, nine hundred one".