684405429 has 8 divisors (see below), whose sum is σ = 914649792. Its totient is φ = 455215680.

The previous prime is 684405427. The next prime is 684405437. The reversal of 684405429 is 924504486.

684405429 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 684405429 - 2¹ = 684405427 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684405427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262137 + ... + 264734.

It is an arithmetic number, because the mean of its divisors is an integer number (114331224).

Almost surely, 2^684405429 is an apocalyptic number.

It is an amenable number.

684405429 is a deficient number, since it is larger than the sum of its proper divisors (230244363).

684405429 is a wasteful number, since it uses less digits than its factorization.

684405429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527307.

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 684405429 is about 26161.1434956502. The cubic root of 684405429 is about 881.2608600241.

The spelling of 684405429 in words is "six hundred eighty-four million, four hundred five thousand, four hundred twenty-nine".