688889067 has 4 divisors (see below), whose sum is σ = 918518760. Its totient is φ = 459259376.

The previous prime is 688889063. The next prime is 688889081. The reversal of 688889067 is 760988886.

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 688889067 - 2² = 688889063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 688889067.

It is not an unprimeable number, because it can be changed into a prime (688889063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114814842 + ... + 114814847.

It is an arithmetic number, because the mean of its divisors is an integer number (229629690).

Almost surely, 2^688889067 is an apocalyptic number.

688889067 is a deficient number, since it is larger than the sum of its proper divisors (229629693).

688889067 is a wasteful number, since it uses less digits than its factorization.

688889067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229629692.

The product of its (nonzero) digits is 9289728, while the sum is 60.

The square root of 688889067 is about 26246.6963063925. The cubic root of 688889067 is about 883.1810949063.

The spelling of 688889067 in words is "six hundred eighty-eight million, eight hundred eighty-nine thousand, sixty-seven".