684122686 has 32 divisors (see below), whose sum is σ = 1136989728. Its totient is φ = 306771840.

The previous prime is 684122629. The next prime is 684122693. The reversal of 684122686 is 686221486.

684122686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129040 + ... + 134236.

It is an arithmetic number, because the mean of its divisors is an integer number (35530929).

Almost surely, 2^684122686 is an apocalyptic number.

684122686 is a deficient number, since it is larger than the sum of its proper divisors (452867042).

684122686 is a wasteful number, since it uses less digits than its factorization.

684122686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5356.

The product of its digits is 221184, while the sum is 43.

The square root of 684122686 is about 26155.7390643048. The cubic root of 684122686 is about 881.1394871997.

The spelling of 684122686 in words is "six hundred eighty-four million, one hundred twenty-two thousand, six hundred eighty-six".