1089309 has 32 divisors (see below), whose sum is σ = 1741824. Its totient is φ = 599040.

The previous prime is 1089299. The next prime is 1089313. The reversal of 1089309 is 9039801.

It is a happy number.

It is not a de Polignac number, because 1089309 - 2¹⁵ = 1056541 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20527 + ... + 20579.

It is an arithmetic number, because the mean of its divisors is an integer number (54432).

2^1089309 is an apocalyptic number.

It is an amenable number.

1089309 is a deficient number, since it is larger than the sum of its proper divisors (652515).

1089309 is a wasteful number, since it uses less digits than its factorization.

1089309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1089309 is about 1043.6996694452. The cubic root of 1089309 is about 102.8924947375.

The spelling of 1089309 in words is "one million, eighty-nine thousand, three hundred nine".