684169136 has 20 divisors (see below), whose sum is σ = 1514946192. Its totient is φ = 293215296.

The previous prime is 684169127. The next prime is 684169141. The reversal of 684169136 is 631961486.

It is a happy number.

684169136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 3054215 + ... + 3054438.

Almost surely, 2^684169136 is an apocalyptic number.

It is an amenable number.

684169136 is an abundant number, since it is smaller than the sum of its proper divisors (830777056).

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

684169136 is a wasteful number, since it uses less digits than its factorization.

684169136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6108668 (or 6108662 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 684169136 is about 26156.6269996726. The cubic root of 684169136 is about 881.1594290434.

The spelling of 684169136 in words is "six hundred eighty-four million, one hundred sixty-nine thousand, one hundred thirty-six".