1109541889 has 2 divisors, whose sum is σ = 1109541890. Its totient is φ = 1109541888.

The previous prime is 1109541887. The next prime is 1109541899. The reversal of 1109541889 is 9881459011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1109422864 + 119025 = 33308^2 + 345^2 .

It is an emirp because it is prime and its reverse (9881459011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1109541889 - 2¹ = 1109541887 is a prime.

Together with 1109541887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1109541887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554770944 + 554770945.

It is an arithmetic number, because the mean of its divisors is an integer number (554770945).

Almost surely, 2^1109541889 is an apocalyptic number.

It is an amenable number.

1109541889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109541889 is an equidigital number, since it uses as much as digits as its factorization.

1109541889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 46.

The square root of 1109541889 is about 33309.7866849969. The cubic root of 1109541889 is about 1035.2563451329.

The spelling of 1109541889 in words is "one billion, one hundred nine million, five hundred forty-one thousand, eight hundred eighty-nine".