3909649 has 8 divisors (see below), whose sum is σ = 4134240. Its totient is φ = 3686976.

The previous prime is 3909641. The next prime is 3909667. The reversal of 3909649 is 9469093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3909649 - 2³ = 3909641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3909641) 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, 6297 + ... + 6889.

It is an arithmetic number, because the mean of its divisors is an integer number (516780).

Almost surely, 2^3909649 is an apocalyptic number.

It is an amenable number.

3909649 is a deficient number, since it is larger than the sum of its proper divisors (224591).

3909649 is a wasteful number, since it uses less digits than its factorization.

3909649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 3909649 is about 1977.2832371717. The cubic root of 3909649 is about 157.5357976915.

The spelling of 3909649 in words is "three million, nine hundred nine thousand, six hundred forty-nine".