871487047 has 4 divisors (see below), whose sum is σ = 871809120. Its totient is φ = 871164976.

The previous prime is 871487039. The next prime is 871487059. The reversal of 871487047 is 740784178.

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 871487047 - 2³ = 871487039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 871486988 and 871487006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871487077) 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, 156943 + ... + 162400.

It is an arithmetic number, because the mean of its divisors is an integer number (217952280).

Almost surely, 2^871487047 is an apocalyptic number.

871487047 is a deficient number, since it is larger than the sum of its proper divisors (322073).

871487047 is a wasteful number, since it uses less digits than its factorization.

871487047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322072.

The product of its (nonzero) digits is 351232, while the sum is 46.

The square root of 871487047 is about 29520.9594525652. The cubic root of 871487047 is about 955.1838674510.

The spelling of 871487047 in words is "eight hundred seventy-one million, four hundred eighty-seven thousand, forty-seven".