679009 has 4 divisors (see below), whose sum is σ = 693504. Its totient is φ = 664516.

The previous prime is 678989. The next prime is 679033. The reversal of 679009 is 900976.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 679009 - 2¹¹ = 676961 is a prime.

It is a super-2 number, since 2×679009² = 922106444162, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679039) 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, 7177 + ... + 7270.

It is an arithmetic number, because the mean of its divisors is an integer number (173376).

2⁶⁷⁹⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

679009 is a deficient number, since it is larger than the sum of its proper divisors (14495).

679009 is a wasteful number, since it uses less digits than its factorization.

679009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14494.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 679009 is about 824.0200240285. The cubic root of 679009 is about 87.8938544568.

The spelling of 679009 in words is "six hundred seventy-nine thousand, nine".