679857719 has 8 divisors (see below), whose sum is σ = 687383520. Its totient is φ = 672372000.

The previous prime is 679857707. The next prime is 679857779. The reversal of 679857719 is 917758976.

679857719 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 679857719 - 2⁸ = 679857463 is a prime.

It is a super-2 number, since 2×679857719² = 924413036167765922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679857779) 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, 24749 + ... + 44409.

It is an arithmetic number, because the mean of its divisors is an integer number (85922940).

Almost surely, 2^679857719 is an apocalyptic number.

679857719 is a deficient number, since it is larger than the sum of its proper divisors (7525801).

679857719 is a wasteful number, since it uses less digits than its factorization.

679857719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20041.

The product of its digits is 6667920, while the sum is 59.

The square root of 679857719 is about 26074.0813644508. The cubic root of 679857719 is about 879.3045982591.

The spelling of 679857719 in words is "six hundred seventy-nine million, eight hundred fifty-seven thousand, seven hundred nineteen".