679394849 has 8 divisors (see below), whose sum is σ = 792297600. Its totient is φ = 582338148.

The previous prime is 679394843. The next prime is 679394879. The reversal of 679394849 is 948493976.

It is not a de Polignac number, because 679394849 - 2⁸ = 679394593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679394843) 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, 990029 + ... + 990714.

It is an arithmetic number, because the mean of its divisors is an integer number (99037200).

Almost surely, 2^679394849 is an apocalyptic number.

It is an amenable number.

679394849 is a deficient number, since it is larger than the sum of its proper divisors (112902751).

679394849 is an equidigital number, since it uses as much as digits as its factorization.

679394849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980764 (or 1980750 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 59.

The square root of 679394849 is about 26065.2037974001. The cubic root of 679394849 is about 879.1049995734.

The spelling of 679394849 in words is "six hundred seventy-nine million, three hundred ninety-four thousand, eight hundred forty-nine".