682691 has 4 divisors (see below), whose sum is σ = 699384. Its totient is φ = 666000.

The previous prime is 682679. The next prime is 682697. The reversal of 682691 is 196286.

682691 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: 196286 = 2 ⋅98143.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-682691 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 682691.

It is not an unprimeable number, because it can be changed into a prime (682697) 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, 8285 + ... + 8366.

It is an arithmetic number, because the mean of its divisors is an integer number (174846).

2⁶⁸²⁶⁹¹ is an apocalyptic number.

682691 is a deficient number, since it is larger than the sum of its proper divisors (16693).

682691 is a wasteful number, since it uses less digits than its factorization.

682691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16692.

The product of its digits is 5184, while the sum is 32.

The square root of 682691 is about 826.2511724651. The cubic root of 682691 is about 88.0524394750.

The spelling of 682691 in words is "six hundred eighty-two thousand, six hundred ninety-one".