47827979 has 2 divisors, whose sum is σ = 47827980. Its totient is φ = 47827978.

The previous prime is 47827961. The next prime is 47827981. The reversal of 47827979 is 97972874.

47827979 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 47827979 - 2¹⁶ = 47762443 is a prime.

Together with 47827981, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47827979.

It is not a weakly prime, because it can be changed into another prime (47127979) 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, 23913989 + 23913990.

It is an arithmetic number, because the mean of its divisors is an integer number (23913990).

Almost surely, 2^47827979 is an apocalyptic number.

47827979 is a deficient number, since it is larger than the sum of its proper divisors (1).

47827979 is an equidigital number, since it uses as much as digits as its factorization.

47827979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 53.

The square root of 47827979 is about 6915.7775412458. Note that the first 3 decimals coincide. The cubic root of 47827979 is about 362.9894559897.

The spelling of 47827979 in words is "forty-seven million, eight hundred twenty-seven thousand, nine hundred seventy-nine".