684398598073 has 2 divisors, whose sum is σ = 684398598074. Its totient is φ = 684398598072.

The previous prime is 684398598041. The next prime is 684398598113. The reversal of 684398598073 is 370895893486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 683537058169 + 861539904 = 826763^2 + 29352^2 .

It is a cyclic number.

It is not a de Polignac number, because 684398598073 - 2⁵ = 684398598041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 684398597993 and 684398598011.

It is not a weakly prime, because it can be changed into another prime (684398598673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342199299036 + 342199299037.

It is an arithmetic number, because the mean of its divisors is an integer number (342199299037).

Almost surely, 2^684398598073 is an apocalyptic number.

It is an amenable number.

684398598073 is a deficient number, since it is larger than the sum of its proper divisors (1).

684398598073 is an equidigital number, since it uses as much as digits as its factorization.

684398598073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 313528320, while the sum is 70.

The spelling of 684398598073 in words is "six hundred eighty-four billion, three hundred ninety-eight million, five hundred ninety-eight thousand, seventy-three".