680653879 has 4 divisors (see below), whose sum is σ = 686898520. Its totient is φ = 674409240.

The previous prime is 680653877. The next prime is 680653889. The reversal of 680653879 is 978356086.

680653879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 680653879 - 2¹ = 680653877 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 (680653877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3122157 + ... + 3122374.

It is an arithmetic number, because the mean of its divisors is an integer number (171724630).

Almost surely, 2^680653879 is an apocalyptic number.

680653879 is a deficient number, since it is larger than the sum of its proper divisors (6244641).

680653879 is a wasteful number, since it uses less digits than its factorization.

680653879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6244640.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The square root of 680653879 is about 26089.3441657701. The cubic root of 680653879 is about 879.6477063495.

The spelling of 680653879 in words is "six hundred eighty million, six hundred fifty-three thousand, eight hundred seventy-nine".