1161044789 has 2 divisors, whose sum is σ = 1161044790. Its totient is φ = 1161044788.

The previous prime is 1161044771. The next prime is 1161044791. The reversal of 1161044789 is 9874401611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 983888689 + 177156100 = 31367^2 + 13310^2 .

It is an emirp because it is prime and its reverse (9874401611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1161044789 - 2²⁴ = 1144267573 is a prime.

Together with 1161044791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161044749) 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 as a sum of consecutive naturals, namely, 580522394 + 580522395.

It is an arithmetic number, because the mean of its divisors is an integer number (580522395).

Almost surely, 2^1161044789 is an apocalyptic number.

It is an amenable number.

1161044789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161044789 is an equidigital number, since it uses as much as digits as its factorization.

1161044789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 1161044789 is about 34074.1073103904. The cubic root of 1161044789 is about 1051.0329333338.

The spelling of 1161044789 in words is "one billion, one hundred sixty-one million, forty-four thousand, seven hundred eighty-nine".