688888888888289 has 2 divisors, whose sum is σ = 688888888888290. Its totient is φ = 688888888888288.

The previous prime is 688888888888283. The next prime is 688888888888363. The reversal of 688888888888289 is 982888888888886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 676999184947264 + 11889703941025 = 26019208^2 + 3448145^2 .

It is a cyclic number.

It is not a de Polignac number, because 688888888888289 - 2⁸ = 688888888888033 is a prime.

It is not a weakly prime, because it can be changed into another prime (688888888888283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344444444444144 + 344444444444145.

It is an arithmetic number, because the mean of its divisors is an integer number (344444444444145).

Almost surely, 2^{688888888888289} is an apocalyptic number.

It is an amenable number.

688888888888289 is a deficient number, since it is larger than the sum of its proper divisors (1).

688888888888289 is an equidigital number, since it uses as much as digits as its factorization.

688888888888289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7421703487488, while the sum is 113.

The spelling of 688888888888289 in words is "six hundred eighty-eight trillion, eight hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, two hundred eighty-nine".