679816 has 8 divisors (see below), whose sum is σ = 1274670. Its totient is φ = 339904.

The previous prime is 679807. The next prime is 679823. The reversal of 679816 is 618976.

679816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 656100 + 23716 = 810^2 + 154^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42481 + ... + 42496.

2⁶⁷⁹⁸¹⁶ is an apocalyptic number.

It is an amenable number.

679816 is a deficient number, since it is larger than the sum of its proper divisors (594854).

679816 is a wasteful number, since it uses less digits than its factorization.

679816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84983 (or 84979 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 679816 is about 824.5095511879. The cubic root of 679816 is about 87.9286611918.

The spelling of 679816 in words is "six hundred seventy-nine thousand, eight hundred sixteen".