684841 has 2 divisors, whose sum is σ = 684842. Its totient is φ = 684840.

The previous prime is 684829. The next prime is 684857. The reversal of 684841 is 148486.

684841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 495616 + 189225 = 704^2 + 435^2 .

It is a cyclic number.

It is not a de Polignac number, because 684841 - 2⁵ = 684809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (681841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342420 + 342421.

It is an arithmetic number, because the mean of its divisors is an integer number (342421).

2⁶⁸⁴⁸⁴¹ is an apocalyptic number.

It is an amenable number.

684841 is a deficient number, since it is larger than the sum of its proper divisors (1).

684841 is an equidigital number, since it uses as much as digits as its factorization.

684841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 31.

The square root of 684841 is about 827.5512068748. The cubic root of 684841 is about 88.1447771785.

It can be divided in two parts, 6848 and 41, that added together give a square (6889 = 83²).

The spelling of 684841 in words is "six hundred eighty-four thousand, eight hundred forty-one".