8447587873 has 4 divisors (see below), whose sum is σ = 8449075348. Its totient is φ = 8446100400.

The previous prime is 8447587849. The next prime is 8447587877. The reversal of 8447587873 is 3787857448.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7784885824 + 662702049 = 88232^2 + 25743^2 .

It is a cyclic number.

It is not a de Polignac number, because 8447587873 - 2¹³ = 8447579681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8447587877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 735186 + ... + 746587.

It is an arithmetic number, because the mean of its divisors is an integer number (2112268837).

Almost surely, 2^8447587873 is an apocalyptic number.

It is an amenable number.

8447587873 is a deficient number, since it is larger than the sum of its proper divisors (1487475).

8447587873 is a wasteful number, since it uses less digits than its factorization.

8447587873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487474.

The product of its digits is 42147840, while the sum is 61.

The square root of 8447587873 is about 91910.7603765740. The cubic root of 8447587873 is about 2036.6242285799.

The spelling of 8447587873 in words is "eight billion, four hundred forty-seven million, five hundred eighty-seven thousand, eight hundred seventy-three".