1089649 has 8 divisors (see below), whose sum is σ = 1258848. Its totient is φ = 932160.

The previous prime is 1089629. The next prime is 1089653. The reversal of 1089649 is 9469801.

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 1089649 - 2¹⁷ = 958577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2727 + ... + 3100.

It is an arithmetic number, because the mean of its divisors is an integer number (157356).

2^1089649 is an apocalyptic number.

It is an amenable number.

1089649 is a deficient number, since it is larger than the sum of its proper divisors (169199).

1089649 is a wasteful number, since it uses less digits than its factorization.

1089649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5855.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1089649 is about 1043.8625388431. The cubic root of 1089649 is about 102.9031987126.

The spelling of 1089649 in words is "one million, eighty-nine thousand, six hundred forty-nine".