3881387 has 2 divisors, whose sum is σ = 3881388. Its totient is φ = 3881386.

The previous prime is 3881363. The next prime is 3881393. The reversal of 3881387 is 7831883.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3881387 - 2⁶ = 3881323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3881387.

It is not a weakly prime, because it can be changed into another prime (3881587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1940693 + 1940694.

It is an arithmetic number, because the mean of its divisors is an integer number (1940694).

Almost surely, 2^3881387 is an apocalyptic number.

3881387 is a deficient number, since it is larger than the sum of its proper divisors (1).

3881387 is an equidigital number, since it uses as much as digits as its factorization.

3881387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The square root of 3881387 is about 1970.1236001835. The cubic root of 3881387 is about 157.1552820164.

The spelling of 3881387 in words is "three million, eight hundred eighty-one thousand, three hundred eighty-seven".