520404208279 has 2 divisors, whose sum is σ = 520404208280. Its totient is φ = 520404208278.

The previous prime is 520404208171. The next prime is 520404208319. The reversal of 520404208279 is 972802404025.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520404208279 - 2⁹ = 520404207767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520404208579) 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, 260202104139 + 260202104140.

It is an arithmetic number, because the mean of its divisors is an integer number (260202104140).

Almost surely, 2^520404208279 is an apocalyptic number.

520404208279 is a deficient number, since it is larger than the sum of its proper divisors (1).

520404208279 is an equidigital number, since it uses as much as digits as its factorization.

520404208279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 520404208279 in words is "five hundred twenty billion, four hundred four million, two hundred eight thousand, two hundred seventy-nine".