688676455 has 4 divisors (see below), whose sum is σ = 826411752. Its totient is φ = 550941160.

The previous prime is 688676447. The next prime is 688676531. The reversal of 688676455 is 554676886.

688676455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 688676455 - 2³ = 688676447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 688676396 and 688676405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68867641 + ... + 68867650.

It is an arithmetic number, because the mean of its divisors is an integer number (206602938).

Almost surely, 2^688676455 is an apocalyptic number.

688676455 is a deficient number, since it is larger than the sum of its proper divisors (137735297).

688676455 is a wasteful number, since it uses less digits than its factorization.

688676455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137735296.

The product of its digits is 9676800, while the sum is 55.

The square root of 688676455 is about 26242.6457317093. The cubic root of 688676455 is about 883.0902267588.

The spelling of 688676455 in words is "six hundred eighty-eight million, six hundred seventy-six thousand, four hundred fifty-five".