679726791 has 12 divisors (see below), whose sum is σ = 983321560. Its totient is φ = 452461680.

The previous prime is 679726781. The next prime is 679726799. The reversal of 679726791 is 197627976.

It is a happy number.

679726791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 679726791 - 2¹⁴ = 679710407 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 (679726799) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51181 + ... + 63078.

Almost surely, 2^679726791 is an apocalyptic number.

679726791 is a deficient number, since it is larger than the sum of its proper divisors (303594769).

679726791 is a wasteful number, since it uses less digits than its factorization.

679726791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114926 (or 114923 counting only the distinct ones).

The product of its digits is 2000376, while the sum is 54.

The square root of 679726791 is about 26071.5705510811. The cubic root of 679726791 is about 879.2481487108.

The spelling of 679726791 in words is "six hundred seventy-nine million, seven hundred twenty-six thousand, seven hundred ninety-one".