680819719 has 16 divisors (see below), whose sum is σ = 714391776. Its totient is φ = 648230400.

The previous prime is 680819717. The next prime is 680819743. The reversal of 680819719 is 917918086.

It is a cyclic number.

It is not a de Polignac number, because 680819719 - 2¹ = 680819717 is a prime.

It is a super-2 number, since 2×680819719² = 927030979558477922, 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 (680819717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 341644 + ... + 343630.

It is an arithmetic number, because the mean of its divisors is an integer number (44649486).

Almost surely, 2^680819719 is an apocalyptic number.

680819719 is a deficient number, since it is larger than the sum of its proper divisors (33572057).

680819719 is a wasteful number, since it uses less digits than its factorization.

680819719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 680819719 is about 26092.5222812974. The cubic root of 680819719 is about 879.7191420350.

The spelling of 680819719 in words is "six hundred eighty million, eight hundred nineteen thousand, seven hundred nineteen".