688888888888867 has 2 divisors, whose sum is σ = 688888888888868. Its totient is φ = 688888888888866.

The previous prime is 688888888888831. The next prime is 688888888889009. The reversal of 688888888888867 is 768888888888886.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-688888888888867 is a prime.

It is not a weakly prime, because it can be changed into another prime (688888888888817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344444444444433 + 344444444444434.

It is an arithmetic number, because the mean of its divisors is an integer number (344444444444434).

Almost surely, 2^{688888888888867} is an apocalyptic number.

688888888888867 is a deficient number, since it is larger than the sum of its proper divisors (1).

688888888888867 is an equidigital number, since it uses as much as digits as its factorization.

688888888888867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17317308137472, while the sum is 115.

The spelling of 688888888888867 in words is "six hundred eighty-eight trillion, eight hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred sixty-seven".