683639 has 8 divisors (see below), whose sum is σ = 785280. Its totient is φ = 588600.

The previous prime is 683603. The next prime is 683651. The reversal of 683639 is 936386.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-683639 is a prime.

It is a d-powerful number, because it can be written as 6² + 8⁵ + 6⁴ + 3¹⁰ + 3¹² + 9⁵ .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 683599 and 683608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (683699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1427 + ... + 1844.

It is an arithmetic number, because the mean of its divisors is an integer number (98160).

2⁶⁸³⁶³⁹ is an apocalyptic number.

683639 is a deficient number, since it is larger than the sum of its proper divisors (101641).

683639 is a wasteful number, since it uses less digits than its factorization.

683639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3301.

The product of its digits is 23328, while the sum is 35.

The square root of 683639 is about 826.8246488827. The cubic root of 683639 is about 88.0931778200.

The spelling of 683639 in words is "six hundred eighty-three thousand, six hundred thirty-nine".