3871663 has 2 divisors, whose sum is σ = 3871664. Its totient is φ = 3871662.

The previous prime is 3871661. The next prime is 3871669. The reversal of 3871663 is 3661783.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3871663 - 2¹ = 3871661 is a prime.

Together with 3871661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3871661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1935831 + 1935832.

It is an arithmetic number, because the mean of its divisors is an integer number (1935832).

Almost surely, 2^3871663 is an apocalyptic number.

3871663 is a deficient number, since it is larger than the sum of its proper divisors (1).

3871663 is an equidigital number, since it uses as much as digits as its factorization.

3871663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

The square root of 3871663 is about 1967.6541870969. The cubic root of 3871663 is about 157.0239324140.

The spelling of 3871663 in words is "three million, eight hundred seventy-one thousand, six hundred sixty-three".