520243907 has 2 divisors, whose sum is σ = 520243908. Its totient is φ = 520243906.

The previous prime is 520243897. The next prime is 520244009. The reversal of 520243907 is 709342025.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520243907 - 2²⁰ = 519195331 is a prime.

It is not a weakly prime, because it can be changed into another prime (520240907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260121953 + 260121954.

It is an arithmetic number, because the mean of its divisors is an integer number (260121954).

Almost surely, 2^520243907 is an apocalyptic number.

520243907 is a deficient number, since it is larger than the sum of its proper divisors (1).

520243907 is an equidigital number, since it uses as much as digits as its factorization.

520243907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 520243907 is about 22808.8558897635. The cubic root of 520243907 is about 804.2708606751.

The spelling of 520243907 in words is "five hundred twenty million, two hundred forty-three thousand, nine hundred seven".