684086679 has 12 divisors (see below), whose sum is σ = 991696056. Its totient is φ = 454409712.

The previous prime is 684086671. The next prime is 684086701. The reversal of 684086679 is 976680486.

684086679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 684086679 - 2³ = 684086671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684086671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134709 + ... + 139694.

It is an arithmetic number, because the mean of its divisors is an integer number (82641338).

Almost surely, 2^684086679 is an apocalyptic number.

684086679 is a deficient number, since it is larger than the sum of its proper divisors (307609377).

684086679 is a wasteful number, since it uses less digits than its factorization.

684086679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274686 (or 274683 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The square root of 684086679 is about 26155.0507359477. The cubic root of 684086679 is about 881.1240281080.

The spelling of 684086679 in words is "six hundred eighty-four million, eighty-six thousand, six hundred seventy-nine".