689044845 has 16 divisors (see below), whose sum is σ = 1106576640. Its totient is φ = 366122304.

The previous prime is 689044819. The next prime is 689044849. The reversal of 689044845 is 548440986.

It is not a de Polignac number, because 689044845 - 2⁵ = 689044813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 689044794 and 689044803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689044849) 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 in 15 ways as a sum of consecutive naturals, for example, 81349 + ... + 89418.

It is an arithmetic number, because the mean of its divisors is an integer number (69161040).

Almost surely, 2^689044845 is an apocalyptic number.

It is an amenable number.

689044845 is a deficient number, since it is larger than the sum of its proper divisors (417531795).

689044845 is a wasteful number, since it uses less digits than its factorization.

689044845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171044.

The product of its (nonzero) digits is 1105920, while the sum is 48.

The square root of 689044845 is about 26249.6637121316. The cubic root of 689044845 is about 883.2476609289.

It can be divided in two parts, 68904 and 4845, that multiplied together give a triangular number (333839880 = T₂₅₈₃₉).

The spelling of 689044845 in words is "six hundred eighty-nine million, forty-four thousand, eight hundred forty-five".