1109165689 has 2 divisors, whose sum is σ = 1109165690. Its totient is φ = 1109165688.

The previous prime is 1109165683. The next prime is 1109165713. The reversal of 1109165689 is 9865619011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 867891600 + 241274089 = 29460^2 + 15533^2 .

It is a cyclic number.

It is not a de Polignac number, because 1109165689 - 2⁵ = 1109165657 is a prime.

It is a super-3 number, since 3×1109165689³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1109165683) 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, 554582844 + 554582845.

It is an arithmetic number, because the mean of its divisors is an integer number (554582845).

Almost surely, 2^1109165689 is an apocalyptic number.

It is an amenable number.

1109165689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109165689 is an equidigital number, since it uses as much as digits as its factorization.

1109165689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 46.

The square root of 1109165689 is about 33304.1392172204. The cubic root of 1109165689 is about 1035.1393276303.

The spelling of 1109165689 in words is "one billion, one hundred nine million, one hundred sixty-five thousand, six hundred eighty-nine".