679566394 has 16 divisors (see below), whose sum is σ = 1114148448. Its totient is φ = 308963952.

The previous prime is 679566389. The next prime is 679566403. The reversal of 679566394 is 493665976.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193312 + ... + 196795.

It is an arithmetic number, because the mean of its divisors is an integer number (69634278).

Almost surely, 2^679566394 is an apocalyptic number.

679566394 is a deficient number, since it is larger than the sum of its proper divisors (434582054).

679566394 is a wasteful number, since it uses less digits than its factorization.

679566394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390189.

The product of its digits is 7348320, while the sum is 55.

The square root of 679566394 is about 26068.4942794938. The cubic root of 679566394 is about 879.1789837357.

It can be divided in two parts, 6 and 79566394, that added together give a square (79566400 = 8920²).

The spelling of 679566394 in words is "six hundred seventy-nine million, five hundred sixty-six thousand, three hundred ninety-four".