38642971 has 2 divisors, whose sum is σ = 38642972. Its totient is φ = 38642970.

The previous prime is 38642969. The next prime is 38642983. The reversal of 38642971 is 17924683.

38642971 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 38642971 - 2¹ = 38642969 is a prime.

Together with 38642969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (38640971) 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, 19321485 + 19321486.

It is an arithmetic number, because the mean of its divisors is an integer number (19321486).

Almost surely, 2^38642971 is an apocalyptic number.

38642971 is a deficient number, since it is larger than the sum of its proper divisors (1).

38642971 is an equidigital number, since it uses as much as digits as its factorization.

38642971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 38642971 is about 6216.3470784698. The cubic root of 38642971 is about 338.0831319858.

The spelling of 38642971 in words is "thirty-eight million, six hundred forty-two thousand, nine hundred seventy-one".