3968609 has 4 divisors (see below), whose sum is σ = 3990960. Its totient is φ = 3946260.

The previous prime is 3968603. The next prime is 3968617. The reversal of 3968609 is 9068693.

3968609 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, and also an emirpimes, since its reverse is a distinct semiprime: 9068693 = 23 ⋅394291.

It is a cyclic number.

It is not a de Polignac number, because 3968609 - 2¹⁶ = 3903073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3968603) 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, 10907 + ... + 11264.

It is an arithmetic number, because the mean of its divisors is an integer number (997740).

Almost surely, 2^3968609 is an apocalyptic number.

It is an amenable number.

3968609 is a deficient number, since it is larger than the sum of its proper divisors (22351).

3968609 is a wasteful number, since it uses less digits than its factorization.

3968609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22350.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 3968609 is about 1992.1367924919. The cubic root of 3968609 is about 158.3237632874.

The spelling of 3968609 in words is "three million, nine hundred sixty-eight thousand, six hundred nine".