3989669 has 16 divisors (see below), whose sum is σ = 4376064. Its totient is φ = 3628800.

The previous prime is 3989663. The next prime is 3989683. The reversal of 3989669 is 9669893.

3989669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3989669 - 2⁴ = 3989653 is a prime.

It is a super-2 number, since 2×3989669² = 31834917459122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989663) 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 15 ways as a sum of consecutive naturals, for example, 54617 + ... + 54689.

It is an arithmetic number, because the mean of its divisors is an integer number (273504).

Almost surely, 2^3989669 is an apocalyptic number.

It is an amenable number.

3989669 is a deficient number, since it is larger than the sum of its proper divisors (386395).

3989669 is a wasteful number, since it uses less digits than its factorization.

3989669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188.

The product of its digits is 629856, while the sum is 50.

The square root of 3989669 is about 1997.4155801936. The cubic root of 3989669 is about 158.6033253709.

The spelling of 3989669 in words is "three million, nine hundred eighty-nine thousand, six hundred sixty-nine".