3847871 has 2 divisors, whose sum is σ = 3847872. Its totient is φ = 3847870.

The previous prime is 3847867. The next prime is 3847873. The reversal of 3847871 is 1787483.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3847871 - 2² = 3847867 is a prime.

It is a super-2 number, since 2×3847871² = 29612222465282, which contains 22 as substring.

Together with 3847873, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3847873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1923935 + 1923936.

It is an arithmetic number, because the mean of its divisors is an integer number (1923936).

Almost surely, 2^3847871 is an apocalyptic number.

3847871 is a deficient number, since it is larger than the sum of its proper divisors (1).

3847871 is an equidigital number, since it uses as much as digits as its factorization.

3847871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 38.

The square root of 3847871 is about 1961.5990925773. The cubic root of 3847871 is about 156.7016254163.

The spelling of 3847871 in words is "three million, eight hundred forty-seven thousand, eight hundred seventy-one".