3944334181 has 4 divisors (see below), whose sum is σ = 3948526764. Its totient is φ = 3940141600.

The previous prime is 3944334157. The next prime is 3944334187. The reversal of 3944334181 is 1814334493.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1922033281 + 2022300900 = 43841^2 + 44970^2 .

It is a cyclic number.

It is not a de Polignac number, because 3944334181 - 2⁹ = 3944333669 is a prime.

It is a super-2 number, since 2×3944334181² = 31115544262809881522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 (3944334187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2094880 + ... + 2096761.

It is an arithmetic number, because the mean of its divisors is an integer number (987131691).

Almost surely, 2^3944334181 is an apocalyptic number.

It is an amenable number.

3944334181 is a deficient number, since it is larger than the sum of its proper divisors (4192583).

3944334181 is an equidigital number, since it uses as much as digits as its factorization.

3944334181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4192582.

The product of its digits is 124416, while the sum is 40.

The square root of 3944334181 is about 62803.9344388550. The cubic root of 3944334181 is about 1580.0029617260.

The spelling of 3944334181 in words is "three billion, nine hundred forty-four million, three hundred thirty-four thousand, one hundred eighty-one".