3867881 has 2 divisors, whose sum is σ = 3867882. Its totient is φ = 3867880.

The previous prime is 3867859. The next prime is 3867889. The reversal of 3867881 is 1887683.

3867881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3297856 + 570025 = 1816^2 + 755^2 .

It is a cyclic number.

It is not a de Polignac number, because 3867881 - 2¹⁰ = 3866857 is a prime.

It is a super-2 number, since 2×3867881² = 29921006860322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3867889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1933940 + 1933941.

It is an arithmetic number, because the mean of its divisors is an integer number (1933941).

Almost surely, 2^3867881 is an apocalyptic number.

It is an amenable number.

3867881 is a deficient number, since it is larger than the sum of its proper divisors (1).

3867881 is an equidigital number, since it uses as much as digits as its factorization.

3867881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 41.

The square root of 3867881 is about 1966.6929094294. The cubic root of 3867881 is about 156.9727866068.

Adding to 3867881 its product of digits (64512), we get a palindrome (3932393).

The spelling of 3867881 in words is "three million, eight hundred sixty-seven thousand, eight hundred eighty-one".