3986109 has 12 divisors (see below), whose sum is σ = 6096636. Its totient is φ = 2500992.

The previous prime is 3986063. The next prime is 3986111. The reversal of 3986109 is 9016893.

3986109 is a `hidden beast` number, since 39 + 8 + 610 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3229209 + 756900 = 1797^2 + 870^2 .

It is not a de Polignac number, because 3986109 - 2⁸ = 3985853 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3986159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12874 + ... + 13179.

It is an arithmetic number, because the mean of its divisors is an integer number (508053).

Almost surely, 2^3986109 is an apocalyptic number.

It is an amenable number.

3986109 is a deficient number, since it is larger than the sum of its proper divisors (2110527).

3986109 is a wasteful number, since it uses less digits than its factorization.

3986109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26076 (or 26073 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 3986109 is about 1996.5242297553. The cubic root of 3986109 is about 158.5561371738.

It can be divided in two parts, 3986 and 109, that added together give a triangular number (4095 = T₉₀).

The spelling of 3986109 in words is "three million, nine hundred eighty-six thousand, one hundred nine".