3869409 has 4 divisors (see below), whose sum is σ = 5159216. Its totient is φ = 2579604.

The previous prime is 3869399. The next prime is 3869417. The reversal of 3869409 is 9049683.

3869409 is digitally balanced in base 2, 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3869409 - 2⁸ = 3869153 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3869009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644899 + ... + 644904.

It is an arithmetic number, because the mean of its divisors is an integer number (1289804).

Almost surely, 2^3869409 is an apocalyptic number.

It is an amenable number.

3869409 is a deficient number, since it is larger than the sum of its proper divisors (1289807).

3869409 is a wasteful number, since it uses less digits than its factorization.

3869409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289806.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 3869409 is about 1967.0813404636. The cubic root of 3869409 is about 156.9934544988.

It can be divided in two parts, 3869 and 409, that added together give a triangular number (4278 = T₉₂).

The spelling of 3869409 in words is "three million, eight hundred sixty-nine thousand, four hundred nine".