688807887 has 16 divisors (see below), whose sum is σ = 1014716160. Its totient is φ = 413401472.

The previous prime is 688807843. The next prime is 688807897. The reversal of 688807887 is 788708886.

It is a cyclic number.

It is not a de Polignac number, because 688807887 - 2⁷ = 688807759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 688807887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688807807) 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, 292437 + ... + 294782.

It is an arithmetic number, because the mean of its divisors is an integer number (63419760).

Almost surely, 2^688807887 is an apocalyptic number.

688807887 is a deficient number, since it is larger than the sum of its proper divisors (325908273).

688807887 is a wasteful number, since it uses less digits than its factorization.

688807887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587262.

The product of its (nonzero) digits is 9633792, while the sum is 60.

The square root of 688807887 is about 26245.1497804833. The cubic root of 688807887 is about 883.1464016292.

Subtracting 688807887 from its reverse (788708886), we obtain a palindrome (99900999).

It can be divided in two parts, 68880 and 7887, that added together give a palindrome (76767).

The spelling of 688807887 in words is "six hundred eighty-eight million, eight hundred seven thousand, eight hundred eighty-seven".