684680885 has 16 divisors (see below), whose sum is σ = 940242816. Its totient is φ = 468869568.

The previous prime is 684680881. The next prime is 684680891. The reversal of 684680885 is 588086486.

It is a cyclic number.

It is not a de Polignac number, because 684680885 - 2² = 684680881 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684680881) 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 15 ways as a sum of consecutive naturals, for example, 14402 + ... + 39708.

It is an arithmetic number, because the mean of its divisors is an integer number (58765176).

Almost surely, 2^684680885 is an apocalyptic number.

It is an amenable number.

684680885 is a deficient number, since it is larger than the sum of its proper divisors (255561931).

684680885 is a wasteful number, since it uses less digits than its factorization.

684680885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26092.

The product of its (nonzero) digits is 2949120, while the sum is 53.

The square root of 684680885 is about 26166.4075677193. The cubic root of 684680885 is about 881.3790726223.

The spelling of 684680885 in words is "six hundred eighty-four million, six hundred eighty thousand, eight hundred eighty-five".