681057719 has 2 divisors, whose sum is σ = 681057720. Its totient is φ = 681057718.

The previous prime is 681057691. The next prime is 681057731. The reversal of 681057719 is 917750186.

681057719 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 681057719 - 2⁸ = 681057463 is a prime.

It is a super-2 number, since 2×681057719² = 927679233218965922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 681057719.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681057919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340528859 + 340528860.

It is an arithmetic number, because the mean of its divisors is an integer number (340528860).

Almost surely, 2^681057719 is an apocalyptic number.

681057719 is a deficient number, since it is larger than the sum of its proper divisors (1).

681057719 is an equidigital number, since it uses as much as digits as its factorization.

681057719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 44.

The square root of 681057719 is about 26097.0825764107. The cubic root of 681057719 is about 879.8216404191.

The spelling of 681057719 in words is "six hundred eighty-one million, fifty-seven thousand, seven hundred nineteen".