1090984789 has 4 divisors (see below), whose sum is σ = 1095230124. Its totient is φ = 1086739456.

The previous prime is 1090984787. The next prime is 1090984847. The reversal of 1090984789 is 9874890901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 728082289 + 362902500 = 26983^2 + 19050^2 .

It is a cyclic number.

It is not a de Polignac number, because 1090984789 - 2¹ = 1090984787 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 (1090984787) 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, 2122282 + ... + 2122795.

It is an arithmetic number, because the mean of its divisors is an integer number (273807531).

Almost surely, 2^1090984789 is an apocalyptic number.

It is an amenable number.

1090984789 is a deficient number, since it is larger than the sum of its proper divisors (4245335).

1090984789 is an equidigital number, since it uses as much as digits as its factorization.

1090984789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4245334.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 1090984789 is about 33030.0588706711. The cubic root of 1090984789 is about 1029.4523085020.

The spelling of 1090984789 in words is "one billion, ninety million, nine hundred eighty-four thousand, seven hundred eighty-nine".