684435189 has 8 divisors (see below), whose sum is σ = 927540832. Its totient is φ = 448809840.

The previous prime is 684435151. The next prime is 684435239. The reversal of 684435189 is 981534486.

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

It is not a de Polignac number, because 684435189 - 2¹³ = 684426997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684435289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1869859 + ... + 1870224.

It is an arithmetic number, because the mean of its divisors is an integer number (115942604).

Almost surely, 2^684435189 is an apocalyptic number.

It is an amenable number.

684435189 is a deficient number, since it is larger than the sum of its proper divisors (243105643).

684435189 is a wasteful number, since it uses less digits than its factorization.

684435189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3740147.

The product of its digits is 829440, while the sum is 48.

The square root of 684435189 is about 26161.7122719443. The cubic root of 684435189 is about 881.2736331271.

The spelling of 684435189 in words is "six hundred eighty-four million, four hundred thirty-five thousand, one hundred eighty-nine".