3661109 has 4 divisors (see below), whose sum is σ = 3674604. Its totient is φ = 3647616.

The previous prime is 3661093. The next prime is 3661111. The reversal of 3661109 is 9011663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9011663 = 29 ⋅310747.

It can be written as a sum of positive squares in 2 ways, for example, as 1030225 + 2630884 = 1015^2 + 1622^2 .

It is a cyclic number.

It is not a de Polignac number, because 3661109 - 2⁴ = 3661093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661139) 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, 6332 + ... + 6885.

It is an arithmetic number, because the mean of its divisors is an integer number (918651).

Almost surely, 2^3661109 is an apocalyptic number.

It is an amenable number.

3661109 is a deficient number, since it is larger than the sum of its proper divisors (13495).

3661109 is a wasteful number, since it uses less digits than its factorization.

3661109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13494.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 3661109 is about 1913.4024668114. The cubic root of 3661109 is about 154.1242180997.

The spelling of 3661109 in words is "three million, six hundred sixty-one thousand, one hundred nine".