1166943389 has 2 divisors, whose sum is σ = 1166943390. Its totient is φ = 1166943388.

The previous prime is 1166943343. The next prime is 1166943413. The reversal of 1166943389 is 9833496611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1159947364 + 6996025 = 34058^2 + 2645^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166943389 - 2²⁸ = 898507933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166943289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583471694 + 583471695.

It is an arithmetic number, because the mean of its divisors is an integer number (583471695).

Almost surely, 2^1166943389 is an apocalyptic number.

It is an amenable number.

1166943389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166943389 is an equidigital number, since it uses as much as digits as its factorization.

1166943389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 50.

The square root of 1166943389 is about 34160.5531132035. The cubic root of 1166943389 is about 1052.8098253042.

The spelling of 1166943389 in words is "one billion, one hundred sixty-six million, nine hundred forty-three thousand, three hundred eighty-nine".