679644441 has 24 divisors (see below), whose sum is σ = 1123513664. Its totient is φ = 387828000.

The previous prime is 679644401. The next prime is 679644451. The reversal of 679644441 is 144446976.

It is not a de Polignac number, because 679644441 - 2²⁵ = 646090009 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (679644401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40566 + ... + 54816.

Almost surely, 2^679644441 is an apocalyptic number.

It is an amenable number.

679644441 is a deficient number, since it is larger than the sum of its proper divisors (443869223).

679644441 is a wasteful number, since it uses less digits than its factorization.

679644441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15021 (or 15018 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 679644441 is about 26069.9911967764. The cubic root of 679644441 is about 879.2126398317.

The spelling of 679644441 in words is "six hundred seventy-nine million, six hundred forty-four thousand, four hundred forty-one".