679983894 has 24 divisors (see below), whose sum is σ = 1550841240. Its totient is φ = 214731648.

The previous prime is 679983883. The next prime is 679983907. The reversal of 679983894 is 498389976.

679983894 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 11 ways as a sum of consecutive naturals, for example, 993787 + ... + 994470.

It is an arithmetic number, because the mean of its divisors is an integer number (64618385).

Almost surely, 2^679983894 is an apocalyptic number.

679983894 is an abundant number, since it is smaller than the sum of its proper divisors (870857346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679983894 is a wasteful number, since it uses less digits than its factorization.

679983894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988284 (or 1988281 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The square root of 679983894 is about 26076.5008005292. The cubic root of 679983894 is about 879.3589916966.

The spelling of 679983894 in words is "six hundred seventy-nine million, nine hundred eighty-three thousand, eight hundred ninety-four".