847870871 has 4 divisors (see below), whose sum is σ = 857397600. Its totient is φ = 838344144.

The previous prime is 847870867. The next prime is 847870901. The reversal of 847870871 is 178078748.

It is a happy number.

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 847870871 - 2² = 847870867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (847870811) by changing a digit.

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, 4763231 + ... + 4763408.

It is an arithmetic number, because the mean of its divisors is an integer number (214349400).

Almost surely, 2^847870871 is an apocalyptic number.

847870871 is a deficient number, since it is larger than the sum of its proper divisors (9526729).

847870871 is an equidigital number, since it uses as much as digits as its factorization.

847870871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9526728.

The product of its (nonzero) digits is 702464, while the sum is 50.

The square root of 847870871 is about 29118.2223186787. Note that the first 3 decimals coincide. The cubic root of 847870871 is about 946.4766518521.

The spelling of 847870871 in words is "eight hundred forty-seven million, eight hundred seventy thousand, eight hundred seventy-one".