679568 has 10 divisors (see below), whose sum is σ = 1316694. Its totient is φ = 339776.

The previous prime is 679561. The next prime is 679597. The reversal of 679568 is 865976.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 478864 + 200704 = 692^2 + 448^2 .

It is not an unprimeable number, because it can be changed into a prime (679561) by changing a digit.

679568 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21221 + ... + 21252.

2⁶⁷⁹⁵⁶⁸ is an apocalyptic number.

It is an amenable number.

679568 is a deficient number, since it is larger than the sum of its proper divisors (637126).

679568 is a wasteful number, since it uses less digits than its factorization.

679568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42481 (or 42475 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 679568 is about 824.3591450333. The cubic root of 679568 is about 87.9179676315.

The spelling of 679568 in words is "six hundred seventy-nine thousand, five hundred sixty-eight".