3906009 has 8 divisors (see below), whose sum is σ = 5786720. Its totient is φ = 2603988.

The previous prime is 3905999. The next prime is 3906017. The reversal of 3906009 is 9006093.

It is not a de Polignac number, because 3906009 - 2⁸ = 3905753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 144667 = 3906009 / (3 + 9 + 0 + 6 + 0 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3906059) 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, 72307 + ... + 72360.

It is an arithmetic number, because the mean of its divisors is an integer number (723340).

Almost surely, 2^3906009 is an apocalyptic number.

It is an amenable number.

3906009 is a deficient number, since it is larger than the sum of its proper divisors (1880711).

3906009 is a wasteful number, since it uses less digits than its factorization.

3906009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144676 (or 144670 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 3906009 is about 1976.3625679515. The cubic root of 3906009 is about 157.4868923332.

The spelling of 3906009 in words is "three million, nine hundred six thousand, nine".