684622196 has 12 divisors (see below), whose sum is σ = 1203061860. Its totient is φ = 340890240.

The previous prime is 684622187. The next prime is 684622199. The reversal of 684622196 is 691226486.

It can be written as a sum of positive squares in 2 ways, for example, as 624000400 + 60621796 = 24980^2 + 7786^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684622199) by changing a digit.

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, 354131 + ... + 356058.

It is an arithmetic number, because the mean of its divisors is an integer number (100255155).

Almost surely, 2^684622196 is an apocalyptic number.

It is an amenable number.

684622196 is a deficient number, since it is larger than the sum of its proper divisors (518439664).

684622196 is a wasteful number, since it uses less digits than its factorization.

684622196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710434 (or 710432 counting only the distinct ones).

The product of its digits is 248832, while the sum is 44.

The square root of 684622196 is about 26165.2860867218. The cubic root of 684622196 is about 881.3538887566.

It can be divided in two parts, 68 and 4622196, that added together give a palindrome (4622264).

The spelling of 684622196 in words is "six hundred eighty-four million, six hundred twenty-two thousand, one hundred ninety-six".