679738 has 8 divisors (see below), whose sum is σ = 1026900. Its totient is φ = 337440.

The previous prime is 679733. The next prime is 679741. The reversal of 679738 is 837976.

It can be written as a sum of positive squares in 2 ways, for example, as 660969 + 18769 = 813^2 + 137^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 679738.

It is not an unprimeable number, because it can be changed into a prime (679733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 843 + ... + 1438.

2⁶⁷⁹⁷³⁸ is an apocalyptic number.

679738 is a deficient number, since it is larger than the sum of its proper divisors (347162).

679738 is a wasteful number, since it uses less digits than its factorization.

679738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2432.

The product of its digits is 63504, while the sum is 40.

The square root of 679738 is about 824.4622489841. The cubic root of 679738 is about 87.9252981750.

The spelling of 679738 in words is "six hundred seventy-nine thousand, seven hundred thirty-eight".