38959891 has 2 divisors, whose sum is σ = 38959892. Its totient is φ = 38959890.

The previous prime is 38959889. The next prime is 38959913. The reversal of 38959891 is 19895983.

38959891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38959891 - 2¹ = 38959889 is a prime.

Together with 38959889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (38959091) 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, 19479945 + 19479946.

It is an arithmetic number, because the mean of its divisors is an integer number (19479946).

Almost surely, 2^38959891 is an apocalyptic number.

38959891 is a deficient number, since it is larger than the sum of its proper divisors (1).

38959891 is an equidigital number, since it uses as much as digits as its factorization.

38959891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 52.

The square root of 38959891 is about 6241.7858822616. The cubic root of 38959891 is about 339.0048496390.

The spelling of 38959891 in words is "thirty-eight million, nine hundred fifty-nine thousand, eight hundred ninety-one".