3965943 has 4 divisors (see below), whose sum is σ = 5287928. Its totient is φ = 2643960.

The previous prime is 3965939. The next prime is 3965963. The reversal of 3965943 is 3495693.

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

It is not a de Polignac number, because 3965943 - 2² = 3965939 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3965903) 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, 660988 + ... + 660993.

It is an arithmetic number, because the mean of its divisors is an integer number (1321982).

Almost surely, 2^3965943 is an apocalyptic number.

3965943 is a deficient number, since it is larger than the sum of its proper divisors (1321985).

3965943 is a wasteful number, since it uses less digits than its factorization.

3965943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321984.

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

The square root of 3965943 is about 1991.4675493214. The cubic root of 3965943 is about 158.2883028608.

The spelling of 3965943 in words is "three million, nine hundred sixty-five thousand, nine hundred forty-three".