47989939 has 2 divisors, whose sum is σ = 47989940. Its totient is φ = 47989938.

The previous prime is 47989883. The next prime is 47989969. The reversal of 47989939 is 93998974.

47989939 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 not a de Polignac number, because 47989939 - 2⁹ = 47989427 is a prime.

It is not a weakly prime, because it can be changed into another prime (47989969) 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, 23994969 + 23994970.

It is an arithmetic number, because the mean of its divisors is an integer number (23994970).

Almost surely, 2^47989939 is an apocalyptic number.

47989939 is a deficient number, since it is larger than the sum of its proper divisors (1).

47989939 is an equidigital number, since it uses as much as digits as its factorization.

47989939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 58.

The square root of 47989939 is about 6927.4771020914. The cubic root of 47989939 is about 363.3987250556.

The spelling of 47989939 in words is "forty-seven million, nine hundred eighty-nine thousand, nine hundred thirty-nine".