3881 has 2 divisors, whose sum is σ = 3882.
Its totient is φ = 3880.
The previous prime is 3877. The next prime is 3889. The reversal of 3881 is 1883.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 3481 + 400 = 59^2 + 20^2
It is a cyclic number.
It is not a de Polignac number, because 3881 - 22 = 3877 is a prime.
It is a super-2 number, since 2×38812 = 30124322, which contains 22 as substring.
It is a Chen prime.
It is a plaindrome in base 15.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (3889) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1940 + 1941.
It is an arithmetic number, because the mean of its divisors is an integer number (1941).
It is an amenable number.
3881 is a deficient number, since it is larger than the sum of its proper divisors (1).
3881 is an equidigital number, since it uses as much as digits as its factorization.
3881 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 192, while the sum is 20.
The square root of 3881 is about 62.2976725087.
The cubic root of 3881 is about 15.7150058702.
The spelling of 3881 in words is "three thousand, eight hundred eighty-one".