688000889 has 2 divisors, whose sum is σ = 688000890. Its totient is φ = 688000888.

The previous prime is 688000867. The next prime is 688000927. The reversal of 688000889 is 988000886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 641760889 + 46240000 = 25333^2 + 6800^2 .

It is a cyclic number.

It is not a de Polignac number, because 688000889 - 2²⁰ = 686952313 is a prime.

It is a Chen prime.

688000889 is a strobogrammatic number because it is the same when read upside-down.

It is not a weakly prime, because it can be changed into another prime (688000189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344000444 + 344000445.

It is an arithmetic number, because the mean of its divisors is an integer number (344000445).

Almost surely, 2^688000889 is an apocalyptic number.

It is an amenable number.

688000889 is a deficient number, since it is larger than the sum of its proper divisors (1).

688000889 is an equidigital number, since it uses as much as digits as its factorization.

688000889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 47.

The square root of 688000889 is about 26229.7710436062. The cubic root of 688000889 is about 882.8013727257.

The spelling of 688000889 in words is "six hundred eighty-eight million, eight hundred eighty-nine", and thus it is an aban number.