684316798727 has 2 divisors, whose sum is σ = 684316798728. Its totient is φ = 684316798726.

The previous prime is 684316798709. The next prime is 684316798889. The reversal of 684316798727 is 727897613486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 684316798727 - 2²⁶ = 684249689863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684316798927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342158399363 + 342158399364.

It is an arithmetic number, because the mean of its divisors is an integer number (342158399364).

Almost surely, 2^684316798727 is an apocalyptic number.

684316798727 is a deficient number, since it is larger than the sum of its proper divisors (1).

684316798727 is an equidigital number, since it uses as much as digits as its factorization.

684316798727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170698752, while the sum is 68.

The spelling of 684316798727 in words is "six hundred eighty-four billion, three hundred sixteen million, seven hundred ninety-eight thousand, seven hundred twenty-seven".