684394229 has 4 divisors (see below), whose sum is σ = 707994060. Its totient is φ = 660794400.

The previous prime is 684394189. The next prime is 684394241. The reversal of 684394229 is 922493486.

684394229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 563350225 + 121044004 = 23735^2 + 11002^2 .

It is a cyclic number.

It is not a de Polignac number, because 684394229 - 2²⁰ = 683345653 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 (684394259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11799872 + ... + 11799929.

It is an arithmetic number, because the mean of its divisors is an integer number (176998515).

Almost surely, 2^684394229 is an apocalyptic number.

It is an amenable number.

684394229 is a deficient number, since it is larger than the sum of its proper divisors (23599831).

684394229 is a wasteful number, since it uses less digits than its factorization.

684394229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23599830.

The product of its digits is 746496, while the sum is 47.

The square root of 684394229 is about 26160.9294368530. The cubic root of 684394229 is about 881.2560528464.

The spelling of 684394229 in words is "six hundred eighty-four million, three hundred ninety-four thousand, two hundred twenty-nine".