1089409 has 4 divisors (see below), whose sum is σ = 1092016. Its totient is φ = 1086804.

The previous prime is 1089401. The next prime is 1089421. The reversal of 1089409 is 9049801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1089409 - 2³ = 1089401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519 + ... + 1564.

It is an arithmetic number, because the mean of its divisors is an integer number (273004).

2^1089409 is an apocalyptic number.

It is an amenable number.

1089409 is a deficient number, since it is larger than the sum of its proper divisors (2607).

1089409 is an equidigital number, since it uses as much as digits as its factorization.

1089409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1089409 is about 1043.7475748475. The cubic root of 1089409 is about 102.8956431967.

The spelling of 1089409 in words is "one million, eighty-nine thousand, four hundred nine".