1171223189 has 2 divisors, whose sum is σ = 1171223190. Its totient is φ = 1171223188.

The previous prime is 1171223173. The next prime is 1171223233. The reversal of 1171223189 is 9813221711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1053327025 + 117896164 = 32455^2 + 10858^2 .

It is a cyclic number.

It is not a de Polignac number, because 1171223189 - 2⁴ = 1171223173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1171223129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585611594 + 585611595.

It is an arithmetic number, because the mean of its divisors is an integer number (585611595).

Almost surely, 2^1171223189 is an apocalyptic number.

It is an amenable number.

1171223189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171223189 is an equidigital number, since it uses as much as digits as its factorization.

1171223189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 35.

The square root of 1171223189 is about 34223.1382108655. The cubic root of 1171223189 is about 1054.0953256190.

The spelling of 1171223189 in words is "one billion, one hundred seventy-one million, two hundred twenty-three thousand, one hundred eighty-nine".