684727873 has 4 divisors (see below), whose sum is σ = 694947760. Its totient is φ = 674507988.

The previous prime is 684727807. The next prime is 684727891. The reversal of 684727873 is 378727486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-684727873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 684727873.

It is not an unprimeable number, because it can be changed into a prime (684727573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5109843 + ... + 5109976.

It is an arithmetic number, because the mean of its divisors is an integer number (173736940).

Almost surely, 2^684727873 is an apocalyptic number.

It is an amenable number.

684727873 is a deficient number, since it is larger than the sum of its proper divisors (10219887).

684727873 is a wasteful number, since it uses less digits than its factorization.

684727873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10219886.

The product of its digits is 3161088, while the sum is 52.

The square root of 684727873 is about 26167.3054210784. The cubic root of 684727873 is about 881.3992344687.

The spelling of 684727873 in words is "six hundred eighty-four million, seven hundred twenty-seven thousand, eight hundred seventy-three".