679946505 has 16 divisors (see below), whose sum is σ = 1243330944. Its totient is φ = 310832640.

The previous prime is 679946479. The next prime is 679946563. The reversal of 679946505 is 505649976.

It is not a de Polignac number, because 679946505 - 2⁸ = 679946249 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3237736 + ... + 3237945.

It is an arithmetic number, because the mean of its divisors is an integer number (77708184).

Almost surely, 2^679946505 is an apocalyptic number.

It is an amenable number.

679946505 is a deficient number, since it is larger than the sum of its proper divisors (563384439).

679946505 is a wasteful number, since it uses less digits than its factorization.

679946505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6475696.

The product of its (nonzero) digits is 2041200, while the sum is 51.

The square root of 679946505 is about 26075.7838808347. The cubic root of 679946505 is about 879.3428741795.

The spelling of 679946505 in words is "six hundred seventy-nine million, nine hundred forty-six thousand, five hundred five".