3811889 has 2 divisors, whose sum is σ = 3811890. Its totient is φ = 3811888.

The previous prime is 3811877. The next prime is 3811891. The reversal of 3811889 is 9881183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3211264 + 600625 = 1792^2 + 775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3811889 is a prime.

It is a Sophie Germain prime.

Together with 3811891, it forms a pair of twin primes.

It is a Chen 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 (3811189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1905944 + 1905945.

It is an arithmetic number, because the mean of its divisors is an integer number (1905945).

Almost surely, 2^3811889 is an apocalyptic number.

It is an amenable number.

3811889 is a deficient number, since it is larger than the sum of its proper divisors (1).

3811889 is an equidigital number, since it uses as much as digits as its factorization.

3811889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 38.

The square root of 3811889 is about 1952.4059516402. The cubic root of 3811889 is about 156.2116484007.

The spelling of 3811889 in words is "three million, eight hundred eleven thousand, eight hundred eighty-nine".