684398598113 has 2 divisors, whose sum is σ = 684398598114. Its totient is φ = 684398598112.

The previous prime is 684398598073. The next prime is 684398598119. The reversal of 684398598113 is 311895893486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 356089079824 + 328309518289 = 596732^2 + 572983^2 .

It is a cyclic number.

It is not a de Polignac number, because 684398598113 - 2¹⁶ = 684398532577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 684398598113.

It is not a weakly prime, because it can be changed into another prime (684398598119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342199299056 + 342199299057.

It is an arithmetic number, because the mean of its divisors is an integer number (342199299057).

Almost surely, 2^684398598113 is an apocalyptic number.

It is an amenable number.

684398598113 is a deficient number, since it is larger than the sum of its proper divisors (1).

684398598113 is an equidigital number, since it uses as much as digits as its factorization.

684398598113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44789760, while the sum is 65.

The spelling of 684398598113 in words is "six hundred eighty-four billion, three hundred ninety-eight million, five hundred ninety-eight thousand, one hundred thirteen".