684111284 has 6 divisors (see below), whose sum is σ = 1197194754. Its totient is φ = 342055640.

The previous prime is 684111269. The next prime is 684111289. The reversal of 684111284 is 482111486.

It is a happy number.

684111284 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 359102500 + 325008784 = 18950^2 + 18028^2 .

It is a super-2 number, since 2×684111284² = 936016497792257312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684111289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85513907 + ... + 85513914.

It is an arithmetic number, because the mean of its divisors is an integer number (199532459).

Almost surely, 2^684111284 is an apocalyptic number.

It is an amenable number.

684111284 is a deficient number, since it is larger than the sum of its proper divisors (513083470).

684111284 is a wasteful number, since it uses less digits than its factorization.

684111284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171027825 (or 171027823 counting only the distinct ones).

The product of its digits is 12288, while the sum is 35.

The square root of 684111284 is about 26155.5210997602. The cubic root of 684111284 is about 881.1345919724.

The spelling of 684111284 in words is "six hundred eighty-four million, one hundred eleven thousand, two hundred eighty-four".