684381413 has 2 divisors, whose sum is σ = 684381414. Its totient is φ = 684381412.

The previous prime is 684381403. The next prime is 684381457. The reversal of 684381413 is 314183486.

684381413 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., 483252289 + 201129124 = 21983^2 + 14182^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-684381413 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684381403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342190706 + 342190707.

It is an arithmetic number, because the mean of its divisors is an integer number (342190707).

Almost surely, 2^684381413 is an apocalyptic number.

It is an amenable number.

684381413 is a deficient number, since it is larger than the sum of its proper divisors (1).

684381413 is an equidigital number, since it uses as much as digits as its factorization.

684381413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 38.

The square root of 684381413 is about 26160.6844902804. The cubic root of 684381413 is about 881.2505519974.

The spelling of 684381413 in words is "six hundred eighty-four million, three hundred eighty-one thousand, four hundred thirteen".