679943 has 4 divisors (see below), whose sum is σ = 741768. Its totient is φ = 618120.

The previous prime is 679933. The next prime is 679951. The reversal of 679943 is 349976.

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

It is a cyclic number.

It is not a de Polignac number, because 679943 - 2⁶ = 679879 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 679897 and 679906.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 679943.

It is not an unprimeable number, because it can be changed into a prime (679933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30896 + ... + 30917.

It is an arithmetic number, because the mean of its divisors is an integer number (185442).

2⁶⁷⁹⁹⁴³ is an apocalyptic number.

679943 is a deficient number, since it is larger than the sum of its proper divisors (61825).

679943 is a wasteful number, since it uses less digits than its factorization.

679943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61824.

The product of its digits is 40824, while the sum is 38.

The square root of 679943 is about 824.5865630727. The cubic root of 679943 is about 87.9341363226.

The spelling of 679943 in words is "six hundred seventy-nine thousand, nine hundred forty-three".