680699 has 4 divisors (see below), whose sum is σ = 691920. Its totient is φ = 669480.

The previous prime is 680681. The next prime is 680707. The reversal of 680699 is 996086.

680699 is nontrivially palindromic in base 7.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 680699 - 2⁸ = 680443 is a prime.

It is a super-2 number, since 2×680699² = 926702257202, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 680699.

It is not an unprimeable number, because it can be changed into a prime (680299) 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, 5519 + ... + 5640.

It is an arithmetic number, because the mean of its divisors is an integer number (172980).

2⁶⁸⁰⁶⁹⁹ is an apocalyptic number.

680699 is a deficient number, since it is larger than the sum of its proper divisors (11221).

680699 is a wasteful number, since it uses less digits than its factorization.

680699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11220.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 680699 is about 825.0448472659. The cubic root of 680699 is about 87.9667143398.

The spelling of 680699 in words is "six hundred eighty thousand, six hundred ninety-nine".