1091533090 has 16 divisors (see below), whose sum is σ = 2068168320. Its totient is φ = 413633520.

The previous prime is 1091533087. The next prime is 1091533097. The reversal of 1091533090 is 903351901.

It is not an unprimeable number, because it can be changed into a prime (1091533097) 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 7 ways as a sum of consecutive naturals, for example, 2872266 + ... + 2872645.

It is an arithmetic number, because the mean of its divisors is an integer number (129260520).

Almost surely, 2^1091533090 is an apocalyptic number.

1091533090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1091533090 is a deficient number, since it is larger than the sum of its proper divisors (976635230).

1091533090 is a wasteful number, since it uses less digits than its factorization.

1091533090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5744937.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 1091533090 is about 33038.3578587072. The cubic root of 1091533090 is about 1029.6247384030.

Adding to 1091533090 its reverse (903351901), we get a palindrome (1994884991).

The spelling of 1091533090 in words is "one billion, ninety-one million, five hundred thirty-three thousand, ninety".