684429 has 8 divisors (see below), whose sum is σ = 944160. Its totient is φ = 440496.

The previous prime is 684427. The next prime is 684433. The reversal of 684429 is 924486.

684429 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 684429 - 2¹ = 684427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 684429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684427) 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, 3847 + ... + 4020.

It is an arithmetic number, because the mean of its divisors is an integer number (118020).

2⁶⁸⁴⁴²⁹ is an apocalyptic number.

It is an amenable number.

684429 is a deficient number, since it is larger than the sum of its proper divisors (259731).

684429 is a wasteful number, since it uses less digits than its factorization.

684429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7899.

The product of its digits is 13824, while the sum is 33.

The square root of 684429 is about 827.3022422307. The cubic root of 684429 is about 88.1270976816.

The spelling of 684429 in words is "six hundred eighty-four thousand, four hundred twenty-nine".