689504113 has 2 divisors, whose sum is σ = 689504114. Its totient is φ = 689504112.

The previous prime is 689504111. The next prime is 689504131. The reversal of 689504113 is 311405986.

689504113 = 18567² + 18568².

Together with next prime (689504131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344770624 + 344733489 = 18568^2 + 18567^2 .

It is a cyclic number.

It is not a de Polignac number, because 689504113 - 2¹ = 689504111 is a prime.

Together with 689504111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (689504111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344752056 + 344752057.

It is an arithmetic number, because the mean of its divisors is an integer number (344752057).

Almost surely, 2^689504113 is an apocalyptic number.

689504113 is the 18568-th centered square number.

It is an amenable number.

689504113 is a deficient number, since it is larger than the sum of its proper divisors (1).

689504113 is an equidigital number, since it uses as much as digits as its factorization.

689504113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 689504113 is about 26258.4103288832. The cubic root of 689504113 is about 883.4438539139.

The spelling of 689504113 in words is "six hundred eighty-nine million, five hundred four thousand, one hundred thirteen".