680719 has 4 divisors (see below), whose sum is σ = 733096. Its totient is φ = 628344.

The previous prime is 680707. The next prime is 680749. The reversal of 680719 is 917086.

680719 = T₁₆₇ + T₁₆₈ + ... + T₂₀₅.

680719 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 917086 = 2 ⋅458543.

It is a cyclic number.

It is not a de Polignac number, because 680719 - 2¹⁵ = 647951 is a prime.

It is a super-2 number, since 2×680719² = 926756713922, which contains 22 as substring.

680719 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26169 + ... + 26194.

It is an arithmetic number, because the mean of its divisors is an integer number (183274).

2⁶⁸⁰⁷¹⁹ is an apocalyptic number.

680719 is a deficient number, since it is larger than the sum of its proper divisors (52377).

680719 is a wasteful number, since it uses less digits than its factorization.

680719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52376.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 680719 is about 825.0569677301. The cubic root of 680719 is about 87.9675758645.

The spelling of 680719 in words is "six hundred eighty thousand, seven hundred nineteen".