684403793 has 2 divisors, whose sum is σ = 684403794. Its totient is φ = 684403792.

The previous prime is 684403789. The next prime is 684403817. The reversal of 684403793 is 397304486.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 406748224 + 277655569 = 20168^2 + 16663^2 .

It is a cyclic number.

It is not a de Polignac number, because 684403793 - 2² = 684403789 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (684403193) 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 as a sum of consecutive naturals, namely, 342201896 + 342201897.

It is an arithmetic number, because the mean of its divisors is an integer number (342201897).

Almost surely, 2^684403793 is an apocalyptic number.

It is an amenable number.

684403793 is a deficient number, since it is larger than the sum of its proper divisors (1).

684403793 is an equidigital number, since it uses as much as digits as its factorization.

684403793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 684403793 is about 26161.1122278851. The cubic root of 684403793 is about 881.2601578361.

The spelling of 684403793 in words is "six hundred eighty-four million, four hundred three thousand, seven hundred ninety-three".