3989065 has 4 divisors (see below), whose sum is σ = 4786884. Its totient is φ = 3191248.

The previous prime is 3989057. The next prime is 3989093. The reversal of 3989065 is 5609893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5609893 = 821 ⋅6833.

It can be written as a sum of positive squares in 2 ways, for example, as 788544 + 3200521 = 888^2 + 1789^2 .

It is a cyclic number.

It is not a de Polignac number, because 3989065 - 2³ = 3989057 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398902 + ... + 398911.

It is an arithmetic number, because the mean of its divisors is an integer number (1196721).

Almost surely, 2^3989065 is an apocalyptic number.

It is an amenable number.

3989065 is a deficient number, since it is larger than the sum of its proper divisors (797819).

3989065 is an equidigital number, since it uses as much as digits as its factorization.

3989065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797818.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 3989065 is about 1997.2643790946. The cubic root of 3989065 is about 158.5953212613.

The spelling of 3989065 in words is "three million, nine hundred eighty-nine thousand, sixty-five".