688067899 has 8 divisors (see below), whose sum is σ = 692073648. Its totient is φ = 684072960.

The previous prime is 688067893. The next prime is 688067903. The reversal of 688067899 is 998760886.

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 688067899 - 2⁵ = 688067867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688067893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148579 + ... + 153139.

It is an arithmetic number, because the mean of its divisors is an integer number (86509206).

Almost surely, 2^688067899 is an apocalyptic number.

688067899 is a deficient number, since it is larger than the sum of its proper divisors (4005749).

688067899 is a wasteful number, since it uses less digits than its factorization.

688067899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5405.

The product of its (nonzero) digits is 10450944, while the sum is 61.

The square root of 688067899 is about 26231.0483778289. The cubic root of 688067899 is about 882.8300328628.

The spelling of 688067899 in words is "six hundred eighty-eight million, sixty-seven thousand, eight hundred ninety-nine".