520512689 has 2 divisors, whose sum is σ = 520512690. Its totient is φ = 520512688.

The previous prime is 520512683. The next prime is 520512697. The reversal of 520512689 is 986215025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 462250000 + 58262689 = 21500^2 + 7633^2 .

It is a cyclic number.

It is not a de Polignac number, because 520512689 - 2²⁸ = 252077233 is a prime.

It is not a weakly prime, because it can be changed into another prime (520512683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260256344 + 260256345.

It is an arithmetic number, because the mean of its divisors is an integer number (260256345).

Almost surely, 2^520512689 is an apocalyptic number.

It is an amenable number.

520512689 is a deficient number, since it is larger than the sum of its proper divisors (1).

520512689 is an equidigital number, since it uses as much as digits as its factorization.

520512689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 520512689 is about 22814.7471824695. The cubic root of 520512689 is about 804.4093446374.

The spelling of 520512689 in words is "five hundred twenty million, five hundred twelve thousand, six hundred eighty-nine".