684711912 has 16 divisors (see below), whose sum is σ = 1711779840. Its totient is φ = 228237296.

The previous prime is 684711901. The next prime is 684711917. The reversal of 684711912 is 219117486.

It is not an unprimeable number, because it can be changed into a prime (684711917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14264808 + ... + 14264855.

It is an arithmetic number, because the mean of its divisors is an integer number (106986240).

Almost surely, 2^684711912 is an apocalyptic number.

It is an amenable number.

684711912 is an abundant number, since it is smaller than the sum of its proper divisors (1027067928).

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

684711912 is a wasteful number, since it uses less digits than its factorization.

684711912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28529672 (or 28529668 counting only the distinct ones).

The product of its digits is 24192, while the sum is 39.

The square root of 684711912 is about 26167.0004394848. Note that the first 3 decimals coincide. The cubic root of 684711912 is about 881.3923859464.

The spelling of 684711912 in words is "six hundred eighty-four million, seven hundred eleven thousand, nine hundred twelve".