520331789 has 2 divisors, whose sum is σ = 520331790. Its totient is φ = 520331788.

The previous prime is 520331771. The next prime is 520331813. The reversal of 520331789 is 987133025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 485320900 + 35010889 = 22030^2 + 5917^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520331789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520331759) 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, 260165894 + 260165895.

It is an arithmetic number, because the mean of its divisors is an integer number (260165895).

Almost surely, 2^520331789 is an apocalyptic number.

It is an amenable number.

520331789 is a deficient number, since it is larger than the sum of its proper divisors (1).

520331789 is an equidigital number, since it uses as much as digits as its factorization.

520331789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 520331789 is about 22810.7822969753. The cubic root of 520331789 is about 804.3161451730.

The spelling of 520331789 in words is "five hundred twenty million, three hundred thirty-one thousand, seven hundred eighty-nine".