679351209 has 4 divisors (see below), whose sum is σ = 905801616. Its totient is φ = 452900804.

The previous prime is 679351159. The next prime is 679351243. The reversal of 679351209 is 902153976.

679351209 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, 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 679351209 - 2⁸ = 679350953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (679351249) 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, 113225199 + ... + 113225204.

It is an arithmetic number, because the mean of its divisors is an integer number (226450404).

Almost surely, 2^679351209 is an apocalyptic number.

It is an amenable number.

679351209 is a deficient number, since it is larger than the sum of its proper divisors (226450407).

679351209 is a wasteful number, since it uses less digits than its factorization.

679351209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226450406.

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 679351209 is about 26064.3666525776. The cubic root of 679351209 is about 879.0861764675.

The spelling of 679351209 in words is "six hundred seventy-nine million, three hundred fifty-one thousand, two hundred nine".