1131329 has 2 divisors, whose sum is σ = 1131330. Its totient is φ = 1131328.

The previous prime is 1131323. The next prime is 1131331. The reversal of 1131329 is 9231311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1081600 + 49729 = 1040^2 + 223^2 .

It is an emirp because it is prime and its reverse (9231311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131329 is a prime.

Together with 1131331, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131329.

It is not a weakly prime, because it can be changed into another prime (1131323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565664 + 565665.

It is an arithmetic number, because the mean of its divisors is an integer number (565665).

2^1131329 is an apocalyptic number.

It is an amenable number.

1131329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131329 is an equidigital number, since it uses as much as digits as its factorization.

1131329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162, while the sum is 20.

The square root of 1131329 is about 1063.6395065999. The cubic root of 1131329 is about 104.1988613730.

The spelling of 1131329 in words is "one million, one hundred thirty-one thousand, three hundred twenty-nine".