8173281121 has 4 divisors (see below), whose sum is σ = 8174101012. Its totient is φ = 8172461232.

The previous prime is 8173281107. The next prime is 8173281143. The reversal of 8173281121 is 1211823718.

8173281121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 3431030625 + 4742250496 = 58575^2 + 68864^2 .

It is a cyclic number.

It is not a de Polignac number, because 8173281121 - 2⁵ = 8173281089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8173282121) 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, 394806 + ... + 414991.

It is an arithmetic number, because the mean of its divisors is an integer number (2043525253).

Almost surely, 2^8173281121 is an apocalyptic number.

It is an amenable number.

8173281121 is a deficient number, since it is larger than the sum of its proper divisors (819891).

8173281121 is a wasteful number, since it uses less digits than its factorization.

8173281121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819890.

The product of its digits is 5376, while the sum is 34.

The square root of 8173281121 is about 90406.2006778296. The cubic root of 8173281121 is about 2014.3370720156.

The spelling of 8173281121 in words is "eight billion, one hundred seventy-three million, two hundred eighty-one thousand, one hundred twenty-one".