871652905 has 4 divisors (see below), whose sum is σ = 1045983492. Its totient is φ = 697322320.

The previous prime is 871652869. The next prime is 871652921. The reversal of 871652905 is 509256178.

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

It can be written as a sum of positive squares in 2 ways, for example, as 649434256 + 222218649 = 25484^2 + 14907^2 .

It is a de Polignac number, because none of the positive numbers 2^k-871652905 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87165286 + ... + 87165295.

It is an arithmetic number, because the mean of its divisors is an integer number (261495873).

Almost surely, 2^871652905 is an apocalyptic number.

It is an amenable number.

871652905 is a deficient number, since it is larger than the sum of its proper divisors (174330587).

871652905 is a wasteful number, since it uses less digits than its factorization.

871652905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174330586.

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 871652905 is about 29523.7684755859. The cubic root of 871652905 is about 955.2444592243.

The spelling of 871652905 in words is "eight hundred seventy-one million, six hundred fifty-two thousand, nine hundred five".