689689986986 has 32 divisors (see below), whose sum is σ = 1389025991808. Its totient is φ = 248040354240.

The previous prime is 689689986949. The next prime is 689689987031.

689689986986 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 689689986895 and 689689986904.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 172248245 + ... + 172252248.

It is an arithmetic number, because the mean of its divisors is an integer number (43407062244).

Almost surely, 2^689689986986 is an apocalyptic number.

689689986986 is an abundant number, since it is smaller than the sum of its proper divisors (699336004822).

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

689689986986 is a wasteful number, since it uses less digits than its factorization.

689689986986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344500526.

The product of its digits is 34828517376, while the sum is 92.

The spelling of 689689986986 in words is "six hundred eighty-nine billion, six hundred eighty-nine million, nine hundred eighty-six thousand, nine hundred eighty-six".