679745547899 has 4 divisors (see below), whose sum is σ = 741540597720. Its totient is φ = 617950498080.

The previous prime is 679745547881. The next prime is 679745547919. The reversal of 679745547899 is 998745547976.

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 679745547899 - 2²⁸ = 679477112443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679745547869) 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, 30897524894 + ... + 30897524915.

It is an arithmetic number, because the mean of its divisors is an integer number (185385149430).

Almost surely, 2^679745547899 is an apocalyptic number.

679745547899 is a deficient number, since it is larger than the sum of its proper divisors (61795049821).

679745547899 is a wasteful number, since it uses less digits than its factorization.

679745547899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61795049820.

The product of its digits is 4800902400, while the sum is 80.

The spelling of 679745547899 in words is "six hundred seventy-nine billion, seven hundred forty-five million, five hundred forty-seven thousand, eight hundred ninety-nine".