684168395 has 4 divisors (see below), whose sum is σ = 821002080. Its totient is φ = 547334712.

The previous prime is 684168391. The next prime is 684168437. The reversal of 684168395 is 593861486.

684168395 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 is a cyclic number.

It is not a de Polignac number, because 684168395 - 2² = 684168391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684168391) 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, 68416835 + ... + 68416844.

It is an arithmetic number, because the mean of its divisors is an integer number (205250520).

Almost surely, 2^684168395 is an apocalyptic number.

684168395 is a deficient number, since it is larger than the sum of its proper divisors (136833685).

684168395 is a wasteful number, since it uses less digits than its factorization.

684168395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136833684.

The product of its digits is 1244160, while the sum is 50.

The square root of 684168395 is about 26156.6128349983. The cubic root of 684168395 is about 881.1591109255.

The spelling of 684168395 in words is "six hundred eighty-four million, one hundred sixty-eight thousand, three hundred ninety-five".