680697 has 16 divisors (see below), whose sum is σ = 1068480. Its totient is φ = 426816.

The previous prime is 680681. The next prime is 680707. The reversal of 680697 is 796086.

It is not a de Polignac number, because 680697 - 2⁴ = 680681 is a prime.

680697 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 680697.

It is not an unprimeable number, because it can be changed into a prime (680657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283 + ... + 1200.

It is an arithmetic number, because the mean of its divisors is an integer number (66780).

2⁶⁸⁰⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

680697 is a deficient number, since it is larger than the sum of its proper divisors (387783).

680697 is a wasteful number, since it uses less digits than its factorization.

680697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509 (or 1503 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 680697 is about 825.0436352097. The cubic root of 680697 is about 87.9666281864.

It can be divided in two parts, 6806 and 97, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 680697 in words is "six hundred eighty thousand, six hundred ninety-seven".