1131320673 has 24 divisors (see below), whose sum is σ = 1905696000. Its totient is φ = 646467192.

The previous prime is 1131320623. The next prime is 1131320681. The reversal of 1131320673 is 3760231311.

It is not a de Polignac number, because 1131320673 - 2⁶ = 1131320609 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1131320623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180153 + ... + 186326.

It is an arithmetic number, because the mean of its divisors is an integer number (79404000).

Almost surely, 2^1131320673 is an apocalyptic number.

It is an amenable number.

1131320673 is a deficient number, since it is larger than the sum of its proper divisors (774375327).

1131320673 is an equidigital number, since it uses as much as digits as its factorization.

1131320673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366506 (or 366489 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 1131320673 is about 33635.1107178199. The cubic root of 1131320673 is about 1041.9860572501.

Adding to 1131320673 its reverse (3760231311), we get a palindrome (4891551984).

The spelling of 1131320673 in words is "one billion, one hundred thirty-one million, three hundred twenty thousand, six hundred seventy-three".