871647247 has 4 divisors (see below), whose sum is σ = 872340840. Its totient is φ = 870953656.

The previous prime is 871647209. The next prime is 871647253. The reversal of 871647247 is 742746178.

871647247 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 871647247 - 2¹⁵ = 871614479 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 871647197 and 871647206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871647277) 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, 344908 + ... + 347425.

It is an arithmetic number, because the mean of its divisors is an integer number (218085210).

Almost surely, 2^871647247 is an apocalyptic number.

871647247 is a deficient number, since it is larger than the sum of its proper divisors (693593).

871647247 is a wasteful number, since it uses less digits than its factorization.

871647247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693592.

The product of its digits is 526848, while the sum is 46.

The square root of 871647247 is about 29523.6726543294. The cubic root of 871647247 is about 955.2423923523.

The spelling of 871647247 in words is "eight hundred seventy-one million, six hundred forty-seven thousand, two hundred forty-seven".