3965813 has 8 divisors (see below), whose sum is σ = 4264320. Its totient is φ = 3676320.

The previous prime is 3965789. The next prime is 3965827. The reversal of 3965813 is 3185693.

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 3965813 - 2¹⁰ = 3964789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3965833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1328 + ... + 3113.

It is an arithmetic number, because the mean of its divisors is an integer number (533040).

Almost surely, 2^3965813 is an apocalyptic number.

It is an amenable number.

3965813 is a deficient number, since it is larger than the sum of its proper divisors (298507).

3965813 is a wasteful number, since it uses less digits than its factorization.

3965813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4507.

The product of its digits is 19440, while the sum is 35.

The square root of 3965813 is about 1991.4349098075. The cubic root of 3965813 is about 158.2865733264.

The spelling of 3965813 in words is "three million, nine hundred sixty-five thousand, eight hundred thirteen".