47581979 has 2 divisors, whose sum is σ = 47581980. Its totient is φ = 47581978.

The previous prime is 47581973. The next prime is 47581987. The reversal of 47581979 is 97918574.

47581979 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 a de Polignac number, because none of the positive numbers 2^k-47581979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47581973) 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, 23790989 + 23790990.

It is an arithmetic number, because the mean of its divisors is an integer number (23790990).

Almost surely, 2^47581979 is an apocalyptic number.

47581979 is a deficient number, since it is larger than the sum of its proper divisors (1).

47581979 is an equidigital number, since it uses as much as digits as its factorization.

47581979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 50.

The square root of 47581979 is about 6897.9691939005. The cubic root of 47581979 is about 362.3660486454.

The spelling of 47581979 in words is "forty-seven million, five hundred eighty-one thousand, nine hundred seventy-nine".