1131444191 has 2 divisors, whose sum is σ = 1131444192. Its totient is φ = 1131444190.

The previous prime is 1131444173. The next prime is 1131444203. The reversal of 1131444191 is 1914441311.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131444191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131446191) 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 as a sum of consecutive naturals, namely, 565722095 + 565722096.

It is an arithmetic number, because the mean of its divisors is an integer number (565722096).

Almost surely, 2^1131444191 is an apocalyptic number.

1131444191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131444191 is an equidigital number, since it uses as much as digits as its factorization.

1131444191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 29.

The square root of 1131444191 is about 33636.9468144777. The cubic root of 1131444191 is about 1042.0239773415.

The spelling of 1131444191 in words is "one billion, one hundred thirty-one million, four hundred forty-four thousand, one hundred ninety-one".