3964643 has 8 divisors (see below), whose sum is σ = 4092528. Its totient is φ = 3838464.

The previous prime is 3964633. The next prime is 3964651. The reversal of 3964643 is 3464693.

It is a happy number.

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 3964643 - 2⁴ = 3964627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3964603) 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, 5555 + ... + 6227.

It is an arithmetic number, because the mean of its divisors is an integer number (511566).

Almost surely, 2^3964643 is an apocalyptic number.

3964643 is a deficient number, since it is larger than the sum of its proper divisors (127885).

3964643 is a wasteful number, since it uses less digits than its factorization.

3964643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853.

The product of its digits is 46656, while the sum is 35.

The square root of 3964643 is about 1991.1411301061. The cubic root of 3964643 is about 158.2710058159.

The spelling of 3964643 in words is "three million, nine hundred sixty-four thousand, six hundred forty-three".