847231987 has 12 divisors (see below), whose sum is σ = 973832880. Its totient is φ = 722033136.

The previous prime is 847231981. The next prime is 847231991. The reversal of 847231987 is 789132748.

It is not a de Polignac number, because 847231987 - 2¹¹ = 847229939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 847231987.

It is not an unprimeable number, because it can be changed into a prime (847231981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1165018 + ... + 1165744.

It is an arithmetic number, because the mean of its divisors is an integer number (81152740).

Almost surely, 2^847231987 is an apocalyptic number.

847231987 is a deficient number, since it is larger than the sum of its proper divisors (126600893).

847231987 is an frugal number, since it uses more digits than its factorization.

847231987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690 (or 963 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The square root of 847231987 is about 29107.2497326697. The cubic root of 847231987 is about 946.2388637823.

The spelling of 847231987 in words is "eight hundred forty-seven million, two hundred thirty-one thousand, nine hundred eighty-seven".