679678 has 4 divisors (see below), whose sum is σ = 1019520. Its totient is φ = 339838.

The previous prime is 679669. The next prime is 679681. The reversal of 679678 is 876976.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169918 + ... + 169921.

It is an arithmetic number, because the mean of its divisors is an integer number (254880).

2⁶⁷⁹⁶⁷⁸ is an apocalyptic number.

679678 is a deficient number, since it is larger than the sum of its proper divisors (339842).

679678 is a wasteful number, since it uses less digits than its factorization.

679678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339841.

The product of its digits is 127008, while the sum is 43.

The square root of 679678 is about 824.4258608268. The cubic root of 679678 is about 87.9227110639.

The spelling of 679678 in words is "six hundred seventy-nine thousand, six hundred seventy-eight".