847471687 has 6 divisors (see below), whose sum is σ = 894423408. Its totient is φ = 802867572.

The previous prime is 847471663. The next prime is 847471697. The reversal of 847471687 is 786174748.

It is a de Polignac number, because none of the positive numbers 2^k-847471687 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 (847471627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1173423 + ... + 1174144.

It is an arithmetic number, because the mean of its divisors is an integer number (149070568).

Almost surely, 2^847471687 is an apocalyptic number.

847471687 is a deficient number, since it is larger than the sum of its proper divisors (46951721).

847471687 is a wasteful number, since it uses less digits than its factorization.

847471687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347605 (or 2347586 counting only the distinct ones).

The product of its digits is 2107392, while the sum is 52.

The square root of 847471687 is about 29111.3669723701. The cubic root of 847471687 is about 946.3280924203.

The spelling of 847471687 in words is "eight hundred forty-seven million, four hundred seventy-one thousand, six hundred eighty-seven".