679109 has 4 divisors (see below), whose sum is σ = 684204. Its totient is φ = 674016.

The previous prime is 679087. The next prime is 679111. The reversal of 679109 is 901976.

679109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 494209 + 184900 = 703^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 679109 - 2¹⁶ = 613573 is a prime.

It is a super-2 number, since 2×679109² = 922378067762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679169) 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, 2342 + ... + 2615.

It is an arithmetic number, because the mean of its divisors is an integer number (171051).

2⁶⁷⁹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

679109 is a deficient number, since it is larger than the sum of its proper divisors (5095).

679109 is a wasteful number, since it uses less digits than its factorization.

679109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5094.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 679109 is about 824.0806999317. The cubic root of 679109 is about 87.8981690555.

The spelling of 679109 in words is "six hundred seventy-nine thousand, one hundred nine".