679605517 has 16 divisors (see below), whose sum is σ = 714384000. Its totient is φ = 645672384.

The previous prime is 679605503. The next prime is 679605523. The reversal of 679605517 is 715506976.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 679605517 - 2¹⁵ = 679572749 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 (679605527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514584 + ... + 515902.

It is an arithmetic number, because the mean of its divisors is an integer number (44649000).

Almost surely, 2^679605517 is an apocalyptic number.

It is an amenable number.

679605517 is a deficient number, since it is larger than the sum of its proper divisors (34778483).

679605517 is a wasteful number, since it uses less digits than its factorization.

679605517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620.

The product of its (nonzero) digits is 396900, while the sum is 46.

The square root of 679605517 is about 26069.2446572585. The cubic root of 679605517 is about 879.1958550130.

The spelling of 679605517 in words is "six hundred seventy-nine million, six hundred five thousand, five hundred seventeen".