38891 has 2 divisors, whose sum is σ = 38892. Its totient is φ = 38890.

The previous prime is 38873. The next prime is 38903. The reversal of 38891 is 19883.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38891 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (38821) 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, 19445 + 19446.

It is an arithmetic number, because the mean of its divisors is an integer number (19446).

2³⁸⁸⁹¹ is an apocalyptic number.

38891 is a deficient number, since it is larger than the sum of its proper divisors (1).

38891 is an equidigital number, since it uses as much as digits as its factorization.

38891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 29.

The square root of 38891 is about 197.2080120076. The cubic root of 38891 is about 33.8804916139.

It can be divided in two parts, 38 and 891, that added together give a palindrome (929).

The spelling of 38891 in words is "thirty-eight thousand, eight hundred ninety-one".