677931879 has 4 divisors (see below), whose sum is σ = 903909176. Its totient is φ = 451954584.

The previous prime is 677931847. The next prime is 677931893. The reversal of 677931879 is 978139776.

677931879 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 not a de Polignac number, because 677931879 - 2⁵ = 677931847 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 (677931179) 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, 112988644 + ... + 112988649.

It is an arithmetic number, because the mean of its divisors is an integer number (225977294).

Almost surely, 2^677931879 is an apocalyptic number.

677931879 is a deficient number, since it is larger than the sum of its proper divisors (225977297).

677931879 is a wasteful number, since it uses less digits than its factorization.

677931879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225977296.

The product of its digits is 4000752, while the sum is 57.

The square root of 677931879 is about 26037.1250141025. The cubic root of 677931879 is about 878.4735413033.

The spelling of 677931879 in words is "six hundred seventy-seven million, nine hundred thirty-one thousand, eight hundred seventy-nine".