684638343 has 48 divisors (see below), whose sum is σ = 1075932000. Its totient is φ = 418037760.

The previous prime is 684638333. The next prime is 684638347. The reversal of 684638343 is 343836486.

684638343 is a `hidden beast` number, since 6 + 8 + 4 + 638 + 3 + 4 + 3 = 666.

It is not a de Polignac number, because 684638343 - 2¹⁰ = 684637319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684638347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1524583 + ... + 1525031.

It is an arithmetic number, because the mean of its divisors is an integer number (22415250).

Almost surely, 2^684638343 is an apocalyptic number.

684638343 is a deficient number, since it is larger than the sum of its proper divisors (391293657).

684638343 is a wasteful number, since it uses less digits than its factorization.

684638343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752 (or 749 counting only the distinct ones).

The product of its digits is 995328, while the sum is 45.

The square root of 684638343 is about 26165.5946425836. The cubic root of 684638343 is about 881.3608176922.

The spelling of 684638343 in words is "six hundred eighty-four million, six hundred thirty-eight thousand, three hundred forty-three".