679391605 has 8 divisors (see below), whose sum is σ = 823185792. Its totient is φ = 538236048.

The previous prime is 679391599. The next prime is 679391623. The reversal of 679391605 is 506193976.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 679391605 - 2³ = 679391597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659089 + ... + 660118.

It is an arithmetic number, because the mean of its divisors is an integer number (102898224).

Almost surely, 2^679391605 is an apocalyptic number.

It is an amenable number.

679391605 is a deficient number, since it is larger than the sum of its proper divisors (143794187).

679391605 is a wasteful number, since it uses less digits than its factorization.

679391605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319315.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 679391605 is about 26065.1415687696. The cubic root of 679391605 is about 879.1036003767.

The spelling of 679391605 in words is "six hundred seventy-nine million, three hundred ninety-one thousand, six hundred five".