688201689 has 16 divisors (see below), whose sum is σ = 1064342528. Its totient is φ = 387387792.

The previous prime is 688201681. The next prime is 688201691. The reversal of 688201689 is 986102886.

688201689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 688201689 - 2³ = 688201681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688201681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243157 + ... + 245970.

It is an arithmetic number, because the mean of its divisors is an integer number (66521408).

Almost surely, 2^688201689 is an apocalyptic number.

It is an amenable number.

688201689 is a deficient number, since it is larger than the sum of its proper divisors (376140839).

688201689 is a wasteful number, since it uses less digits than its factorization.

688201689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489204.

The product of its (nonzero) digits is 331776, while the sum is 48.

The square root of 688201689 is about 26233.5984760002. The cubic root of 688201689 is about 882.8872492004.

The spelling of 688201689 in words is "six hundred eighty-eight million, two hundred one thousand, six hundred eighty-nine".