3944965 has 4 divisors (see below), whose sum is σ = 4733964. Its totient is φ = 3155968.

The previous prime is 3944953. The next prime is 3944987. The reversal of 3944965 is 5694493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5694493 = 7 ⋅813499.

It can be written as a sum of positive squares in 2 ways, for example, as 1179396 + 2765569 = 1086^2 + 1663^2 .

It is a cyclic number.

It is not a de Polignac number, because 3944965 - 2⁵ = 3944933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394492 + ... + 394501.

It is an arithmetic number, because the mean of its divisors is an integer number (1183491).

Almost surely, 2^3944965 is an apocalyptic number.

It is an amenable number.

3944965 is a deficient number, since it is larger than the sum of its proper divisors (788999).

3944965 is an equidigital number, since it uses as much as digits as its factorization.

3944965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788998.

The product of its digits is 116640, while the sum is 40.

The square root of 3944965 is about 1986.1935958008. The cubic root of 3944965 is about 158.0087187412.

The spelling of 3944965 in words is "three million, nine hundred forty-four thousand, nine hundred sixty-five".