688671199 has 4 divisors (see below), whose sum is σ = 690074280. Its totient is φ = 687268120.

The previous prime is 688671197. The next prime is 688671211. The reversal of 688671199 is 991176886.

688671199 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 a cyclic number.

It is not a de Polignac number, because 688671199 - 2¹ = 688671197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688671197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700804 + ... + 701785.

It is an arithmetic number, because the mean of its divisors is an integer number (172518570).

Almost surely, 2^688671199 is an apocalyptic number.

688671199 is a deficient number, since it is larger than the sum of its proper divisors (1403081).

688671199 is a wasteful number, since it uses less digits than its factorization.

688671199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403080.

The product of its digits is 1306368, while the sum is 55.

The square root of 688671199 is about 26242.5455891764. The cubic root of 688671199 is about 883.0879801625.

The spelling of 688671199 in words is "six hundred eighty-eight million, six hundred seventy-one thousand, one hundred ninety-nine".