684181012 has 12 divisors (see below), whose sum is σ = 1198390816. Its totient is φ = 341783640.

The previous prime is 684181009. The next prime is 684181027. The reversal of 684181012 is 210181486.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 71664 + ... + 80647.

Almost surely, 2^684181012 is an apocalyptic number.

It is an amenable number.

684181012 is a deficient number, since it is larger than the sum of its proper divisors (514209804).

684181012 is a wasteful number, since it uses less digits than its factorization.

684181012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153438 (or 153436 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 684181012 is about 26156.8540157260. The cubic root of 684181012 is about 881.1645274848.

The spelling of 684181012 in words is "six hundred eighty-four million, one hundred eighty-one thousand, twelve".