684914865 has 16 divisors (see below), whose sum is σ = 1096562688. Its totient is φ = 365054976.

The previous prime is 684914863. The next prime is 684914873. The reversal of 684914865 is 568419486.

684914865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 684914865 - 2¹ = 684914863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684914863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11217 + ... + 38673.

It is an arithmetic number, because the mean of its divisors is an integer number (68535168).

Almost surely, 2^684914865 is an apocalyptic number.

It is an amenable number.

684914865 is a deficient number, since it is larger than the sum of its proper divisors (411647823).

684914865 is a wasteful number, since it uses less digits than its factorization.

684914865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29128.

The product of its digits is 1658880, while the sum is 51.

The square root of 684914865 is about 26170.8781854947. The cubic root of 684914865 is about 881.4794607948.

The spelling of 684914865 in words is "six hundred eighty-four million, nine hundred fourteen thousand, eight hundred sixty-five".