1131441173 has 4 divisors (see below), whose sum is σ = 1131513900. Its totient is φ = 1131368448.

The previous prime is 1131441163. The next prime is 1131441197. The reversal of 1131441173 is 3711441311.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3711441311 = 179 ⋅20734309.

It can be written as a sum of positive squares in 2 ways, for example, as 1128489649 + 2951524 = 33593^2 + 1718^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131441173 - 2¹² = 1131437077 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 (1131441133) 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 3 ways as a sum of consecutive naturals, for example, 2540 + ... + 47637.

It is an arithmetic number, because the mean of its divisors is an integer number (282878475).

Almost surely, 2^1131441173 is an apocalyptic number.

It is an amenable number.

1131441173 is a deficient number, since it is larger than the sum of its proper divisors (72727).

1131441173 is an equidigital number, since it uses as much as digits as its factorization.

1131441173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72726.

The product of its digits is 1008, while the sum is 26.

The square root of 1131441173 is about 33636.9019530634. The cubic root of 1131441173 is about 1042.0230508468.

Adding to 1131441173 its reverse (3711441311), we get a palindrome (4842882484).

The spelling of 1131441173 in words is "one billion, one hundred thirty-one million, four hundred forty-one thousand, one hundred seventy-three".