689134866 has 16 divisors (see below), whose sum is σ = 1575165504. Its totient is φ = 196895664.

The previous prime is 689134861. The next prime is 689134903. The reversal of 689134866 is 668431986.

It is not an unprimeable number, because it can be changed into a prime (689134861) 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, 8203945 + ... + 8204028.

It is an arithmetic number, because the mean of its divisors is an integer number (98447844).

Almost surely, 2^689134866 is an apocalyptic number.

689134866 is an abundant number, since it is smaller than the sum of its proper divisors (886030638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689134866 is a wasteful number, since it uses less digits than its factorization.

689134866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16407985.

The product of its digits is 1492992, while the sum is 51.

The square root of 689134866 is about 26251.3783638117. The cubic root of 689134866 is about 883.2861235321.

The spelling of 689134866 in words is "six hundred eighty-nine million, one hundred thirty-four thousand, eight hundred sixty-six".