683691 has 8 divisors (see below), whose sum is σ = 915600. Its totient is φ = 453792.

The previous prime is 683687. The next prime is 683693. The reversal of 683691 is 196386.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 683691 - 2² = 683687 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (683693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 721 + ... + 1373.

It is an arithmetic number, because the mean of its divisors is an integer number (114450).

2⁶⁸³⁶⁹¹ is an apocalyptic number.

683691 is a deficient number, since it is larger than the sum of its proper divisors (231909).

683691 is a wasteful number, since it uses less digits than its factorization.

683691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005.

The product of its digits is 7776, while the sum is 33.

The square root of 683691 is about 826.8560938882. The cubic root of 683691 is about 88.0954113230.

The spelling of 683691 in words is "six hundred eighty-three thousand, six hundred ninety-one".