688873354889 has 2 divisors, whose sum is σ = 688873354890. Its totient is φ = 688873354888.

The previous prime is 688873354879. The next prime is 688873354891. The reversal of 688873354889 is 988453378886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 682097595664 + 6775759225 = 825892^2 + 82315^2 .

It is a cyclic number.

It is not a de Polignac number, because 688873354889 - 2²⁰ = 688872306313 is a prime.

It is a super-2 number, since 2×688873354889² (a number of 24 digits) contains 22 as substring.

Together with 688873354891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (688873354849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344436677444 + 344436677445.

It is an arithmetic number, because the mean of its divisors is an integer number (344436677445).

Almost surely, 2^688873354889 is an apocalyptic number.

It is an amenable number.

688873354889 is a deficient number, since it is larger than the sum of its proper divisors (1).

688873354889 is an equidigital number, since it uses as much as digits as its factorization.

688873354889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2229534720, while the sum is 77.

The spelling of 688873354889 in words is "six hundred eighty-eight billion, eight hundred seventy-three million, three hundred fifty-four thousand, eight hundred eighty-nine".