3813965 has 12 divisors (see below), whose sum is σ = 4832604. Its totient is φ = 2889216.

The previous prime is 3813959. The next prime is 3813983. The reversal of 3813965 is 5693183.

3813965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 417316 + 3396649 = 646^2 + 1843^2 .

It is not a de Polignac number, because 3813965 - 2⁴ = 3813949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 749 + ... + 2861.

It is an arithmetic number, because the mean of its divisors is an integer number (402717).

Almost surely, 2^3813965 is an apocalyptic number.

It is an amenable number.

3813965 is a deficient number, since it is larger than the sum of its proper divisors (1018639).

3813965 is a wasteful number, since it uses less digits than its factorization.

3813965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156 (or 2137 counting only the distinct ones).

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

The square root of 3813965 is about 1952.9375310030. The cubic root of 3813965 is about 156.2400014935.

The spelling of 3813965 in words is "three million, eight hundred thirteen thousand, nine hundred sixty-five".