679818 has 16 divisors (see below), whose sum is σ = 1406880. Its totient is φ = 218736.

The previous prime is 679807. The next prime is 679823. The reversal of 679818 is 818976.

It is an Ulam number.

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1780 + ... + 2127.

It is an arithmetic number, because the mean of its divisors is an integer number (87930).

2⁶⁷⁹⁸¹⁸ is an apocalyptic number.

679818 is an abundant number, since it is smaller than the sum of its proper divisors (727062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679818 is a wasteful number, since it uses less digits than its factorization.

679818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3941.

The product of its digits is 24192, while the sum is 39.

The square root of 679818 is about 824.5107640292. The cubic root of 679818 is about 87.9287474196.

The spelling of 679818 in words is "six hundred seventy-nine thousand, eight hundred eighteen".