38971091 has 2 divisors, whose sum is σ = 38971092. Its totient is φ = 38971090.

The previous prime is 38971063. The next prime is 38971103. The reversal of 38971091 is 19017983.

38971091 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 is an emirp because it is prime and its reverse (19017983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38971091 - 2²² = 34776787 is a prime.

It is equal to p_2374769 and since 38971091 and 2374769 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (38971001) 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, 19485545 + 19485546.

It is an arithmetic number, because the mean of its divisors is an integer number (19485546).

Almost surely, 2^38971091 is an apocalyptic number.

38971091 is a deficient number, since it is larger than the sum of its proper divisors (1).

38971091 is an equidigital number, since it uses as much as digits as its factorization.

38971091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 38971091 is about 6242.6829969173. The cubic root of 38971091 is about 339.0373316818.

The spelling of 38971091 in words is "thirty-eight million, nine hundred seventy-one thousand, ninety-one".