1091082989 has 8 divisors (see below), whose sum is σ = 1117957632. Its totient is φ = 1064276640.

The previous prime is 1091082943. The next prime is 1091082997. The reversal of 1091082989 is 9892801901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1091082989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091081989) 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, 16052 + ... + 49394.

It is an arithmetic number, because the mean of its divisors is an integer number (139744704).

Almost surely, 2^1091082989 is an apocalyptic number.

It is an amenable number.

1091082989 is a deficient number, since it is larger than the sum of its proper divisors (26874643).

1091082989 is an equidigital number, since it uses as much as digits as its factorization.

1091082989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34147.

The product of its (nonzero) digits is 93312, while the sum is 47.

The square root of 1091082989 is about 33031.5453619718. The cubic root of 1091082989 is about 1029.4831947205.

The spelling of 1091082989 in words is "one billion, ninety-one million, eighty-two thousand, nine hundred eighty-nine".