688827845 has 8 divisors (see below), whose sum is σ = 875216664. Its totient is φ = 518646784.

The previous prime is 688827829. The next prime is 688827859. The reversal of 688827845 is 548728886.

It is a happy number.

688827845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 310252996 + 378574849 = 17614^2 + 19457^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 688827845 - 2⁴ = 688827829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4051844 + ... + 4052013.

It is an arithmetic number, because the mean of its divisors is an integer number (109402083).

Almost surely, 2^688827845 is an apocalyptic number.

It is an amenable number.

688827845 is a deficient number, since it is larger than the sum of its proper divisors (186388819).

688827845 is a wasteful number, since it uses less digits than its factorization.

688827845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8103879.

The product of its digits is 6881280, while the sum is 56.

The square root of 688827845 is about 26245.5300003639. The cubic root of 688827845 is about 883.1549311801.

The spelling of 688827845 in words is "six hundred eighty-eight million, eight hundred twenty-seven thousand, eight hundred forty-five".