3811949 has 2 divisors, whose sum is σ = 3811950. Its totient is φ = 3811948.

The previous prime is 3811939. The next prime is 3811967. The reversal of 3811949 is 9491183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3678724 + 133225 = 1918^2 + 365^2 .

It is a cyclic number.

It is not a de Polignac number, because 3811949 - 2²⁰ = 2763373 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3811909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1905974 + 1905975.

It is an arithmetic number, because the mean of its divisors is an integer number (1905975).

Almost surely, 2^3811949 is an apocalyptic number.

It is an amenable number.

3811949 is a deficient number, since it is larger than the sum of its proper divisors (1).

3811949 is an equidigital number, since it uses as much as digits as its factorization.

3811949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 35.

The square root of 3811949 is about 1952.4213172366. The cubic root of 3811949 is about 156.2124679987.

The spelling of 3811949 in words is "three million, eight hundred eleven thousand, nine hundred forty-nine".