3965439 has 4 divisors (see below), whose sum is σ = 5287256. Its totient is φ = 2643624.

The previous prime is 3965419. The next prime is 3965441. The reversal of 3965439 is 9345693.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3965439 - 2¹¹ = 3963391 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3965397 and 3965406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3965419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660904 + ... + 660909.

It is an arithmetic number, because the mean of its divisors is an integer number (1321814).

Almost surely, 2^3965439 is an apocalyptic number.

3965439 is a deficient number, since it is larger than the sum of its proper divisors (1321817).

3965439 is a wasteful number, since it uses less digits than its factorization.

3965439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321816.

The product of its digits is 87480, while the sum is 39.

The square root of 3965439 is about 1991.3410054534. The cubic root of 3965439 is about 158.2815973783.

It can be divided in two parts, 39654 and 39, that added together give a palindrome (39693).

The spelling of 3965439 in words is "three million, nine hundred sixty-five thousand, four hundred thirty-nine".