680321879 has 4 divisors (see below), whose sum is σ = 680879376. Its totient is φ = 679764384.

The previous prime is 680321869. The next prime is 680321903. The reversal of 680321879 is 978123086.

680321879 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 680321879 - 2¹² = 680317783 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 (680321839) 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, 276914 + ... + 279359.

It is an arithmetic number, because the mean of its divisors is an integer number (170219844).

Almost surely, 2^680321879 is an apocalyptic number.

680321879 is a deficient number, since it is larger than the sum of its proper divisors (557497).

680321879 is a wasteful number, since it uses less digits than its factorization.

680321879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557496.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 680321879 is about 26082.9806387230. The cubic root of 680321879 is about 879.5046622643.

It can be divided in two parts, 6803 and 21879, that added together give a palindrome (28682).

The spelling of 680321879 in words is "six hundred eighty million, three hundred twenty-one thousand, eight hundred seventy-nine".