688545897 has 8 divisors (see below), whose sum is σ = 988681344. Its totient is φ = 423720528.

The previous prime is 688545889. The next prime is 688545899. The reversal of 688545897 is 798545886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 688545897 - 2³ = 688545889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 688545897.

It is not an unprimeable number, because it can be changed into a prime (688545899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8827473 + ... + 8827550.

It is an arithmetic number, because the mean of its divisors is an integer number (123585168).

Almost surely, 2^688545897 is an apocalyptic number.

It is an amenable number.

688545897 is a deficient number, since it is larger than the sum of its proper divisors (300135447).

688545897 is a wasteful number, since it uses less digits than its factorization.

688545897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17655039.

The product of its digits is 19353600, while the sum is 60.

The square root of 688545897 is about 26240.1580978469. The cubic root of 688545897 is about 883.0344183651.

The spelling of 688545897 in words is "six hundred eighty-eight million, five hundred forty-five thousand, eight hundred ninety-seven".