684041 has 4 divisors (see below), whose sum is σ = 689172. Its totient is φ = 678912.

The previous prime is 684037. The next prime is 684053. The reversal of 684041 is 140486.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 319225 + 364816 = 565^2 + 604^2 .

It is a cyclic number.

It is not a de Polignac number, because 684041 - 2² = 684037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 683998 and 684016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2360 + ... + 2633.

It is an arithmetic number, because the mean of its divisors is an integer number (172293).

2⁶⁸⁴⁰⁴¹ is an apocalyptic number.

It is an amenable number.

684041 is a deficient number, since it is larger than the sum of its proper divisors (5131).

684041 is a wasteful number, since it uses less digits than its factorization.

684041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5130.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 684041 is about 827.0677118592. The cubic root of 684041 is about 88.1104415700.

The spelling of 684041 in words is "six hundred eighty-four thousand, forty-one".