500868689 has 2 divisors, whose sum is σ = 500868690. Its totient is φ = 500868688.

The previous prime is 500868679. The next prime is 500868691. The reversal of 500868689 is 986868005.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 463756225 + 37112464 = 21535^2 + 6092^2 .

It is a cyclic number.

It is not a de Polignac number, because 500868689 - 2⁴ = 500868673 is a prime.

Together with 500868691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (500868619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250434344 + 250434345.

It is an arithmetic number, because the mean of its divisors is an integer number (250434345).

Almost surely, 2^500868689 is an apocalyptic number.

It is an amenable number.

500868689 is a deficient number, since it is larger than the sum of its proper divisors (1).

500868689 is an equidigital number, since it uses as much as digits as its factorization.

500868689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 50.

The square root of 500868689 is about 22380.0958219575. The cubic root of 500868689 is about 794.1599126548.

The spelling of 500868689 in words is "five hundred million, eight hundred sixty-eight thousand, six hundred eighty-nine".