1089209 has 8 divisors (see below), whose sum is σ = 1203552. Its totient is φ = 977440.

The previous prime is 1089197. The next prime is 1089217. The reversal of 1089209 is 9029801.

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

It is a cyclic number.

It is not a de Polignac number, because 1089209 - 2⁸ = 1088953 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1089239) 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 7 ways as a sum of consecutive naturals, for example, 317 + ... + 1509.

It is an arithmetic number, because the mean of its divisors is an integer number (150444).

2^1089209 is an apocalyptic number.

It is an amenable number.

1089209 is a deficient number, since it is larger than the sum of its proper divisors (114343).

1089209 is a wasteful number, since it uses less digits than its factorization.

1089209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1089209 is about 1043.6517618440. The cubic root of 1089209 is about 102.8893460857.

The spelling of 1089209 in words is "one million, eighty-nine thousand, two hundred nine".