688929886 has 4 divisors (see below), whose sum is σ = 1033394832. Its totient is φ = 344464942.

The previous prime is 688929883. The next prime is 688929889.

688929886 is nontrivially palindromic in base 10.

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

It is an interprime number because it is at equal distance from previous prime (688929883) and next prime (688929889).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688929883) 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 as a sum of consecutive naturals, namely, 172232470 + ... + 172232473.

It is an arithmetic number, because the mean of its divisors is an integer number (258348708).

Almost surely, 2^688929886 is an apocalyptic number.

688929886 is a deficient number, since it is larger than the sum of its proper divisors (344464946).

688929886 is a wasteful number, since it uses less digits than its factorization.

688929886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344464945.

The product of its digits is 23887872, while the sum is 64.

The square root of 688929886 is about 26247.4738975011. The cubic root of 688929886 is about 883.1985383810.

The spelling of 688929886 in words is "six hundred eighty-eight million, nine hundred twenty-nine thousand, eight hundred eighty-six".