3944693 has 4 divisors (see below), whose sum is σ = 3960300. Its totient is φ = 3929088.

The previous prime is 3944683. The next prime is 3944711. The reversal of 3944693 is 3964493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3964493 = 13 ⋅304961.

It can be written as a sum of positive squares in 2 ways, for example, as 2900209 + 1044484 = 1703^2 + 1022^2 .

It is a cyclic number.

It is not a de Polignac number, because 3944693 - 2¹² = 3940597 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3944683) 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, 7418 + ... + 7931.

It is an arithmetic number, because the mean of its divisors is an integer number (990075).

Almost surely, 2^3944693 is an apocalyptic number.

It is an amenable number.

3944693 is a deficient number, since it is larger than the sum of its proper divisors (15607).

3944693 is a wasteful number, since it uses less digits than its factorization.

3944693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15606.

The product of its digits is 69984, while the sum is 38.

The square root of 3944693 is about 1986.1251219397. The cubic root of 3944693 is about 158.0050871620.

The spelling of 3944693 in words is "three million, nine hundred forty-four thousand, six hundred ninety-three".