1091533089 has 4 divisors (see below), whose sum is σ = 1455377456. Its totient is φ = 727688724.

The previous prime is 1091533087. The next prime is 1091533097. The reversal of 1091533089 is 9803351901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1091533089 - 2¹ = 1091533087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091533081) 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 in 3 ways as a sum of consecutive naturals, for example, 181922179 + ... + 181922184.

It is an arithmetic number, because the mean of its divisors is an integer number (363844364).

Almost surely, 2^1091533089 is an apocalyptic number.

It is an amenable number.

1091533089 is a deficient number, since it is larger than the sum of its proper divisors (363844367).

1091533089 is an equidigital number, since it uses as much as digits as its factorization.

1091533089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363844366.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 1091533089 is about 33038.3578435733. The cubic root of 1091533089 is about 1029.6247380885.

The spelling of 1091533089 in words is "one billion, ninety-one million, five hundred thirty-three thousand, eighty-nine".