3964813 has 4 divisors (see below), whose sum is σ = 3996160. Its totient is φ = 3933468.

The previous prime is 3964811. The next prime is 3964819. The reversal of 3964813 is 3184693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3964813 - 2¹ = 3964811 is a prime.

It is a Duffinian number.

3964813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3964811) 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, 15483 + ... + 15736.

It is an arithmetic number, because the mean of its divisors is an integer number (999040).

Almost surely, 2^3964813 is an apocalyptic number.

It is an amenable number.

3964813 is a deficient number, since it is larger than the sum of its proper divisors (31347).

3964813 is a wasteful number, since it uses less digits than its factorization.

3964813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31346.

The product of its digits is 15552, while the sum is 34.

The square root of 3964813 is about 1991.1838187370. The cubic root of 3964813 is about 158.2732679521.

The spelling of 3964813 in words is "three million, nine hundred sixty-four thousand, eight hundred thirteen".