684484441 has 2 divisors, whose sum is σ = 684484442. Its totient is φ = 684484440.

The previous prime is 684484417. The next prime is 684484487. The reversal of 684484441 is 144484486.

684484441 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., 428324416 + 256160025 = 20696^2 + 16005^2 .

It is a cyclic number.

It is not a de Polignac number, because 684484441 - 2¹⁹ = 683960153 is a prime.

It is not a weakly prime, because it can be changed into another prime (684484841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342242220 + 342242221.

It is an arithmetic number, because the mean of its divisors is an integer number (342242221).

Almost surely, 2^684484441 is an apocalyptic number.

It is an amenable number.

684484441 is a deficient number, since it is larger than the sum of its proper divisors (1).

684484441 is an equidigital number, since it uses as much as digits as its factorization.

684484441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 393216, while the sum is 43.

The square root of 684484441 is about 26162.6535542555. The cubic root of 684484441 is about 881.2947714557.

The spelling of 684484441 in words is "six hundred eighty-four million, four hundred eighty-four thousand, four hundred forty-one".