679904505799 has 4 divisors (see below), whose sum is σ = 695716238536. Its totient is φ = 664092773064.

The previous prime is 679904505793. The next prime is 679904505809. The reversal of 679904505799 is 997505409976.

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

It is a cyclic number.

It is not a de Polignac number, because 679904505799 - 2¹⁹ = 679903981511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679904505793) 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, 7905866304 + ... + 7905866389.

It is an arithmetic number, because the mean of its divisors is an integer number (173929059634).

Almost surely, 2^679904505799 is an apocalyptic number.

679904505799 is a deficient number, since it is larger than the sum of its proper divisors (15811732737).

679904505799 is a wasteful number, since it uses less digits than its factorization.

679904505799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15811732736.

The product of its (nonzero) digits is 192893400, while the sum is 70.

The spelling of 679904505799 in words is "six hundred seventy-nine billion, nine hundred four million, five hundred five thousand, seven hundred ninety-nine".