680797 has 4 divisors (see below), whose sum is σ = 733180. Its totient is φ = 628416.

The previous prime is 680783. The next prime is 680803. The reversal of 680797 is 797086.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 797086 = 2 ⋅398543.

It can be written as a sum of positive squares in 2 ways, for example, as 285156 + 395641 = 534^2 + 629^2 .

It is a cyclic number.

It is not a de Polignac number, because 680797 - 2¹¹ = 678749 is a prime.

It is a Duffinian number.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680707) 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 3 ways as a sum of consecutive naturals, for example, 26172 + ... + 26197.

It is an arithmetic number, because the mean of its divisors is an integer number (183295).

2⁶⁸⁰⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

680797 is a deficient number, since it is larger than the sum of its proper divisors (52383).

680797 is a wasteful number, since it uses less digits than its factorization.

680797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52382.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 680797 is about 825.1042358393. The cubic root of 680797 is about 87.9709356497.

It can be divided in two parts, 68079 and 7, that added together give a palindrome (68086).

The spelling of 680797 in words is "six hundred eighty thousand, seven hundred ninety-seven".