681701719 has 2 divisors, whose sum is σ = 681701720. Its totient is φ = 681701718.

The previous prime is 681701707. The next prime is 681701759. The reversal of 681701719 is 917107186.

681701719 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (681701759) can be obtained adding 681701719 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681701719 - 2²⁷ = 547483991 is a prime.

It is a super-2 number, since 2×681701719² = 929434467375109922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681701759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340850859 + 340850860.

It is an arithmetic number, because the mean of its divisors is an integer number (340850860).

Almost surely, 2^681701719 is an apocalyptic number.

681701719 is a deficient number, since it is larger than the sum of its proper divisors (1).

681701719 is an equidigital number, since it uses as much as digits as its factorization.

681701719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 40.

The square root of 681701719 is about 26109.4182049313. The cubic root of 681701719 is about 880.0988693150.

The spelling of 681701719 in words is "six hundred eighty-one million, seven hundred one thousand, seven hundred nineteen".