39386881 has 2 divisors, whose sum is σ = 39386882. Its totient is φ = 39386880.

The previous prime is 39386873. The next prime is 39386887. The reversal of 39386881 is 18868393.

39386881 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., 38638656 + 748225 = 6216^2 + 865^2 .

It is an emirp because it is prime and its reverse (18868393) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39386881 - 2³ = 39386873 is a prime.

It is a super-2 number, since 2×39386881² = 3102652789816322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39386887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19693440 + 19693441.

It is an arithmetic number, because the mean of its divisors is an integer number (19693441).

Almost surely, 2^39386881 is an apocalyptic number.

It is an amenable number.

39386881 is a deficient number, since it is larger than the sum of its proper divisors (1).

39386881 is an equidigital number, since it uses as much as digits as its factorization.

39386881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 46.

The square root of 39386881 is about 6275.8968283425. The cubic root of 39386881 is about 340.2388200999.

The spelling of 39386881 in words is "thirty-nine million, three hundred eighty-six thousand, eight hundred eighty-one".