3946811949 has 6 divisors (see below), whose sum is σ = 5700950606. Its totient is φ = 2631207960.

The previous prime is 3946811909. The next prime is 3946812007. The reversal of 3946811949 is 9491186493.

It is a happy number.

3946811949 is a `hidden beast` number, since 394 + 68 + 1 + 194 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2652971049 + 1293840900 = 51507^2 + 35970^2 .

It is not a de Polignac number, because 3946811949 - 2⁹ = 3946811437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3946811895 and 3946811904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3946811909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 219267322 + ... + 219267339.

Almost surely, 2^3946811949 is an apocalyptic number.

It is an amenable number.

3946811949 is a deficient number, since it is larger than the sum of its proper divisors (1754138657).

3946811949 is a wasteful number, since it uses less digits than its factorization.

3946811949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438534667 (or 438534664 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 3946811949 is about 62823.6575582797. The cubic root of 3946811949 is about 1580.3337367170. Note that the first 3 decimals are identical.

The spelling of 3946811949 in words is "three billion, nine hundred forty-six million, eight hundred eleven thousand, nine hundred forty-nine".