3939665 has 8 divisors (see below), whose sum is σ = 5005800. Its totient is φ = 2966272.

The previous prime is 3939641. The next prime is 3939671. The reversal of 3939665 is 5669393.

3939665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 341056 + 3598609 = 584^2 + 1897^2 .

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 3939665 - 2¹⁴ = 3923281 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 23090 + ... + 23259.

It is an arithmetic number, because the mean of its divisors is an integer number (625725).

Almost surely, 2^3939665 is an apocalyptic number.

It is an amenable number.

3939665 is a deficient number, since it is larger than the sum of its proper divisors (1066135).

3939665 is a wasteful number, since it uses less digits than its factorization.

3939665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46371.

The product of its digits is 131220, while the sum is 41.

The square root of 3939665 is about 1984.8589370532. The cubic root of 3939665 is about 157.9379262651.

The spelling of 3939665 in words is "three million, nine hundred thirty-nine thousand, six hundred sixty-five".