684393683 has 4 divisors (see below), whose sum is σ = 687977088. Its totient is φ = 680810280.

The previous prime is 684393631. The next prime is 684393767. The reversal of 684393683 is 386393486.

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

It is a cyclic number.

It is not a de Polignac number, because 684393683 - 2¹⁴ = 684377299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684393613) 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 3 ways as a sum of consecutive naturals, for example, 1791416 + ... + 1791797.

It is an arithmetic number, because the mean of its divisors is an integer number (171994272).

Almost surely, 2^684393683 is an apocalyptic number.

684393683 is a deficient number, since it is larger than the sum of its proper divisors (3583405).

684393683 is a wasteful number, since it uses less digits than its factorization.

684393683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583404.

The product of its digits is 2239488, while the sum is 50.

The square root of 684393683 is about 26160.9190014418. The cubic root of 684393683 is about 881.2558184952.

The spelling of 684393683 in words is "six hundred eighty-four million, three hundred ninety-three thousand, six hundred eighty-three".