1108689 has 8 divisors (see below), whose sum is σ = 1565280. Its totient is φ = 695616.

The previous prime is 1108663. The next prime is 1108691. The reversal of 1108689 is 9868011.

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

It is not a de Polignac number, because 1108689 - 2⁷ = 1108561 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

1108689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1108609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10819 + ... + 10920.

It is an arithmetic number, because the mean of its divisors is an integer number (195660).

2^1108689 is an apocalyptic number.

It is an amenable number.

1108689 is a deficient number, since it is larger than the sum of its proper divisors (456591).

1108689 is a wasteful number, since it uses less digits than its factorization.

1108689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21759.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 1108689 is about 1052.9430184013. The cubic root of 1108689 is about 103.4991014882.

It can be divided in two parts, 11086 and 89, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 1108689 in words is "one million, one hundred eight thousand, six hundred eighty-nine".