679857 has 16 divisors (see below), whose sum is σ = 967680. Its totient is φ = 423632.

The previous prime is 679843. The next prime is 679859. The reversal of 679857 is 758976.

It is a cyclic number.

It is not a de Polignac number, because 679857 - 2⁶ = 679793 is a prime.

Its product of digits (105840) is a multiple of the sum of its prime divisors (252).

It is not an unprimeable number, because it can be changed into a prime (679859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3988 + ... + 4154.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2⁶⁷⁹⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

679857 is a deficient number, since it is larger than the sum of its proper divisors (287823).

679857 is a wasteful number, since it uses less digits than its factorization.

679857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252.

The product of its digits is 105840, while the sum is 42.

The square root of 679857 is about 824.5344140786. The cubic root of 679857 is about 87.9304288282.

The spelling of 679857 in words is "six hundred seventy-nine thousand, eight hundred fifty-seven".