8661109 has 4 divisors (see below), whose sum is σ = 9170604. Its totient is φ = 8151616.

The previous prime is 8661089. The next prime is 8661119. The reversal of 8661109 is 9011668.

It is a happy number.

8661109 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5062500 + 3598609 = 2250^2 + 1897^2 .

It is a cyclic number.

It is not a de Polignac number, because 8661109 - 2¹¹ = 8659061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8661119) 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, 254722 + ... + 254755.

It is an arithmetic number, because the mean of its divisors is an integer number (2292651).

Almost surely, 2^8661109 is an apocalyptic number.

It is an amenable number.

8661109 is a deficient number, since it is larger than the sum of its proper divisors (509495).

8661109 is a wasteful number, since it uses less digits than its factorization.

8661109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509494.

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

The square root of 8661109 is about 2942.9762146507. The cubic root of 8661109 is about 205.3640882584.

The spelling of 8661109 in words is "eight million, six hundred sixty-one thousand, one hundred nine".