679678609 has 8 divisors (see below), whose sum is σ = 695139840. Its totient is φ = 664259136.

The previous prime is 679678603. The next prime is 679678613. The reversal of 679678609 is 906876976.

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

It is a cyclic number.

It is not a de Polignac number, because 679678609 - 2¹¹ = 679676561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679678603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23737 + ... + 43849.

It is an arithmetic number, because the mean of its divisors is an integer number (86892480).

Almost surely, 2^679678609 is an apocalyptic number.

It is an amenable number.

679678609 is a deficient number, since it is larger than the sum of its proper divisors (15461231).

679678609 is a wasteful number, since it uses less digits than its factorization.

679678609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20879.

The product of its (nonzero) digits is 6858432, while the sum is 58.

The square root of 679678609 is about 26070.6465013816. The cubic root of 679678609 is about 879.2273732385.

The spelling of 679678609 in words is "six hundred seventy-nine million, six hundred seventy-eight thousand, six hundred nine".