865473905 has 8 divisors (see below), whose sum is σ = 1040969832. Its totient is φ = 690778368.

The previous prime is 865473899. The next prime is 865473913. The reversal of 865473905 is 509374568.

865473905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5400976 + 860072929 = 2324^2 + 29327^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 865473905 - 2⁸ = 865473649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 865473905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197714 + ... + 202043.

It is an arithmetic number, because the mean of its divisors is an integer number (130121229).

Almost surely, 2^865473905 is an apocalyptic number.

It is an amenable number.

865473905 is a deficient number, since it is larger than the sum of its proper divisors (175495927).

865473905 is a wasteful number, since it uses less digits than its factorization.

865473905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400195.

The product of its (nonzero) digits is 907200, while the sum is 47.

The square root of 865473905 is about 29418.9378632200. The cubic root of 865473905 is about 952.9819157136.

The spelling of 865473905 in words is "eight hundred sixty-five million, four hundred seventy-three thousand, nine hundred five".