689848985 has 16 divisors (see below), whose sum is σ = 969155712. Its totient is φ = 461500800.

The previous prime is 689848969. The next prime is 689849003. The reversal of 689848985 is 589848986.

It is not a de Polignac number, because 689848985 - 2⁴ = 689848969 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 238931 + ... + 241800.

It is an arithmetic number, because the mean of its divisors is an integer number (60572232).

Almost surely, 2^689848985 is an apocalyptic number.

It is an amenable number.

689848985 is a deficient number, since it is larger than the sum of its proper divisors (279306727).

689848985 is a wasteful number, since it uses less digits than its factorization.

689848985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480784.

The product of its digits is 39813120, while the sum is 65.

The square root of 689848985 is about 26264.9763944307. The cubic root of 689848985 is about 883.5911212327.

Subtracting from 689848985 its reverse (589848986), we obtain a palindrome (99999999).

The spelling of 689848985 in words is "six hundred eighty-nine million, eight hundred forty-eight thousand, nine hundred eighty-five".