3988609 has 4 divisors (see below), whose sum is σ = 4002516. Its totient is φ = 3974704.

The previous prime is 3988601. The next prime is 3988619. The reversal of 3988609 is 9068893.

3988609 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.

It can be written as a sum of positive squares in 2 ways, for example, as 1555009 + 2433600 = 1247^2 + 1560^2 .

It is a cyclic number.

It is not a de Polignac number, because 3988609 - 2³ = 3988601 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (3988601) 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, 6514 + ... + 7099.

It is an arithmetic number, because the mean of its divisors is an integer number (1000629).

Almost surely, 2^3988609 is an apocalyptic number.

It is an amenable number.

3988609 is a deficient number, since it is larger than the sum of its proper divisors (13907).

3988609 is a wasteful number, since it uses less digits than its factorization.

3988609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13906.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 3988609 is about 1997.1502196880. The cubic root of 3988609 is about 158.5892778884.

The spelling of 3988609 in words is "three million, nine hundred eighty-eight thousand, six hundred nine".