688343887 has 8 divisors (see below), whose sum is σ = 858195072. Its totient is φ = 536371800.

The previous prime is 688343867. The next prime is 688343897. The reversal of 688343887 is 788343886.

688343887 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 cyclic number.

It is not a de Polignac number, because 688343887 - 2¹¹ = 688341839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688343867) 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, 4469689 + ... + 4469842.

It is an arithmetic number, because the mean of its divisors is an integer number (107274384).

Almost surely, 2^688343887 is an apocalyptic number.

688343887 is a deficient number, since it is larger than the sum of its proper divisors (169851185).

688343887 is a wasteful number, since it uses less digits than its factorization.

688343887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8939549.

The product of its digits is 6193152, while the sum is 55.

The square root of 688343887 is about 26236.3085627533. The cubic root of 688343887 is about 882.9480531562.

Subtracting 688343887 from its reverse (788343886), we obtain a palindrome (99999999).

The spelling of 688343887 in words is "six hundred eighty-eight million, three hundred forty-three thousand, eight hundred eighty-seven".