688098804389 has 2 divisors, whose sum is σ = 688098804390. Its totient is φ = 688098804388.

The previous prime is 688098804359. The next prime is 688098804397. The reversal of 688098804389 is 983408890886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 598856204164 + 89242600225 = 773858^2 + 298735^2 .

It is a cyclic number.

It is not a de Polignac number, because 688098804389 - 2¹² = 688098800293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688098804359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344049402194 + 344049402195.

It is an arithmetic number, because the mean of its divisors is an integer number (344049402195).

Almost surely, 2^688098804389 is an apocalyptic number.

It is an amenable number.

688098804389 is a deficient number, since it is larger than the sum of its proper divisors (1).

688098804389 is an equidigital number, since it uses as much as digits as its factorization.

688098804389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 191102976, while the sum is 71.

The spelling of 688098804389 in words is "six hundred eighty-eight billion, ninety-eight million, eight hundred four thousand, three hundred eighty-nine".