520431769 has 12 divisors (see below), whose sum is σ = 616050148. Its totient is φ = 436724640.

The previous prime is 520431739. The next prime is 520431773. The reversal of 520431769 is 967134025.

It can be written as a sum of positive squares in 2 ways, for example, as 46063369 + 474368400 = 6787^2 + 21780^2 .

It is not a de Polignac number, because 520431769 - 2⁹ = 520431257 is a prime.

It is a super-2 number, since 2×520431769² = 541698452368938722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520431719) 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 in 11 ways as a sum of consecutive naturals, for example, 163854 + ... + 166999.

Almost surely, 2^520431769 is an apocalyptic number.

It is an amenable number.

520431769 is a deficient number, since it is larger than the sum of its proper divisors (95618379).

520431769 is a wasteful number, since it uses less digits than its factorization.

520431769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330888 (or 330877 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 520431769 is about 22812.9736991914. The cubic root of 520431769 is about 804.3676574195.

The spelling of 520431769 in words is "five hundred twenty million, four hundred thirty-one thousand, seven hundred sixty-nine".