684524212 has 12 divisors (see below), whose sum is σ = 1214327716. Its totient is φ = 337573440.

The previous prime is 684524209. The next prime is 684524221. The reversal of 684524212 is 212425486.

It can be written as a sum of positive squares in 2 ways, for example, as 479347236 + 205176976 = 21894^2 + 14324^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1171839 + ... + 1172422.

Almost surely, 2^684524212 is an apocalyptic number.

It is an amenable number.

684524212 is a deficient number, since it is larger than the sum of its proper divisors (529803504).

684524212 is a wasteful number, since it uses less digits than its factorization.

684524212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344338 (or 2344336 counting only the distinct ones).

The product of its digits is 30720, while the sum is 34.

The square root of 684524212 is about 26163.4136151994. The cubic root of 684524212 is about 881.3118399204.

Adding to 684524212 its reverse (212425486), we get a palindrome (896949698).

The spelling of 684524212 in words is "six hundred eighty-four million, five hundred twenty-four thousand, two hundred twelve".