689607173 has 4 divisors (see below), whose sum is σ = 694640940. Its totient is φ = 684573408.

The previous prime is 689607169. The next prime is 689607239. The reversal of 689607173 is 371706986.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 395930404 + 293676769 = 19898^2 + 17137^2 .

It is a cyclic number.

It is not a de Polignac number, because 689607173 - 2² = 689607169 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689607673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2516678 + ... + 2516951.

It is an arithmetic number, because the mean of its divisors is an integer number (173660235).

Almost surely, 2^689607173 is an apocalyptic number.

It is an amenable number.

689607173 is a deficient number, since it is larger than the sum of its proper divisors (5033767).

689607173 is a wasteful number, since it uses less digits than its factorization.

689607173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5033766.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 689607173 is about 26260.3726744310. The cubic root of 689607173 is about 883.4878677619.

The spelling of 689607173 in words is "six hundred eighty-nine million, six hundred seven thousand, one hundred seventy-three".