520252377989 has 2 divisors, whose sum is σ = 520252377990. Its totient is φ = 520252377988.

The previous prime is 520252377947. The next prime is 520252377991. The reversal of 520252377989 is 989773252025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 520143864100 + 108513889 = 721210^2 + 10417^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520252377989 is a prime.

Together with 520252377991, 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 (520252377929) 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, 260126188994 + 260126188995.

It is an arithmetic number, because the mean of its divisors is an integer number (260126188995).

Almost surely, 2^520252377989 is an apocalyptic number.

It is an amenable number.

520252377989 is a deficient number, since it is larger than the sum of its proper divisors (1).

520252377989 is an equidigital number, since it uses as much as digits as its factorization.

520252377989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19051200, while the sum is 59.

The spelling of 520252377989 in words is "five hundred twenty billion, two hundred fifty-two million, three hundred seventy-seven thousand, nine hundred eighty-nine".