688868147 has 8 divisors (see below), whose sum is σ = 784166400. Its totient is φ = 599015560.

The previous prime is 688868113. The next prime is 688868207. The reversal of 688868147 is 741868886.

688868147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-688868147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 688868092 and 688868101.

It is not an unprimeable number, because it can be changed into a prime (688868647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1361147 + ... + 1361652.

It is an arithmetic number, because the mean of its divisors is an integer number (98020800).

Almost surely, 2^688868147 is an apocalyptic number.

688868147 is a deficient number, since it is larger than the sum of its proper divisors (95298253).

688868147 is a wasteful number, since it uses less digits than its factorization.

688868147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722833.

The product of its digits is 4128768, while the sum is 56.

The square root of 688868147 is about 26246.2977770199. The cubic root of 688868147 is about 883.1721547462.

The spelling of 688868147 in words is "six hundred eighty-eight million, eight hundred sixty-eight thousand, one hundred forty-seven".