520351439 has 2 divisors, whose sum is σ = 520351440. Its totient is φ = 520351438.

The previous prime is 520351417. The next prime is 520351441. The reversal of 520351439 is 934153025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520351439 - 2¹⁶ = 520285903 is a prime.

Together with 520351441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520311439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260175719 + 260175720.

It is an arithmetic number, because the mean of its divisors is an integer number (260175720).

Almost surely, 2^520351439 is an apocalyptic number.

520351439 is a deficient number, since it is larger than the sum of its proper divisors (1).

520351439 is an equidigital number, since it uses as much as digits as its factorization.

520351439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 520351439 is about 22811.2130102719. The cubic root of 520351439 is about 804.3262698752.

The spelling of 520351439 in words is "five hundred twenty million, three hundred fifty-one thousand, four hundred thirty-nine".