3908009 has 4 divisors (see below), whose sum is σ = 4466304. Its totient is φ = 3349716.

The previous prime is 3907991. The next prime is 3908017. The reversal of 3908009 is 9008093.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9008093 = 149 ⋅60457.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3908009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3908029) 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, 279137 + ... + 279150.

It is an arithmetic number, because the mean of its divisors is an integer number (1116576).

Almost surely, 2^3908009 is an apocalyptic number.

It is an amenable number.

3908009 is a deficient number, since it is larger than the sum of its proper divisors (558295).

3908009 is an equidigital number, since it uses as much as digits as its factorization.

3908009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558294.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 3908009 is about 1976.8684832330. The cubic root of 3908009 is about 157.5137671681.

The spelling of 3908009 in words is "three million, nine hundred eight thousand, nine".