520831673 has 2 divisors, whose sum is σ = 520831674. Its totient is φ = 520831672.

The previous prime is 520831639. The next prime is 520831679. The reversal of 520831673 is 376138025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 490932649 + 29899024 = 22157^2 + 5468^2 .

It is a cyclic number.

It is not a de Polignac number, because 520831673 - 2²² = 516637369 is a prime.

It is not a weakly prime, because it can be changed into another prime (520831679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260415836 + 260415837.

It is an arithmetic number, because the mean of its divisors is an integer number (260415837).

Almost surely, 2^520831673 is an apocalyptic number.

It is an amenable number.

520831673 is a deficient number, since it is larger than the sum of its proper divisors (1).

520831673 is an equidigital number, since it uses as much as digits as its factorization.

520831673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 520831673 is about 22821.7368532721. The cubic root of 520831673 is about 804.5736322189.

Adding to 520831673 its reverse (376138025), we get a palindrome (896969698).

The spelling of 520831673 in words is "five hundred twenty million, eight hundred thirty-one thousand, six hundred seventy-three".