38542991 has 2 divisors, whose sum is σ = 38542992. Its totient is φ = 38542990.

The previous prime is 38542981. The next prime is 38542997. The reversal of 38542991 is 19924583.

38542991 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38542991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38542997) 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, 19271495 + 19271496.

It is an arithmetic number, because the mean of its divisors is an integer number (19271496).

Almost surely, 2^38542991 is an apocalyptic number.

38542991 is a deficient number, since it is larger than the sum of its proper divisors (1).

38542991 is an equidigital number, since it uses as much as digits as its factorization.

38542991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 38542991 is about 6208.3001699338. The cubic root of 38542991 is about 337.7913087991.

The spelling of 38542991 in words is "thirty-eight million, five hundred forty-two thousand, nine hundred ninety-one".