679039817009 has 4 divisors (see below), whose sum is σ = 679062243840. Its totient is φ = 679017390180.

The previous prime is 679039816997. The next prime is 679039817017. The reversal of 679039817009 is 900718930976.

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 a de Polignac number, because none of the positive numbers 2^k-679039817009 is a prime.

It is a super-2 number, since 2×679039817009² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679039817059) 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, 11167937 + ... + 11228574.

It is an arithmetic number, because the mean of its divisors is an integer number (169765560960).

Almost surely, 2^679039817009 is an apocalyptic number.

It is an amenable number.

679039817009 is a deficient number, since it is larger than the sum of its proper divisors (22426831).

679039817009 is a wasteful number, since it uses less digits than its factorization.

679039817009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22426830.

The product of its (nonzero) digits is 5143824, while the sum is 59.

The spelling of 679039817009 in words is "six hundred seventy-nine billion, thirty-nine million, eight hundred seventeen thousand, nine".