47720291 has 2 divisors, whose sum is σ = 47720292. Its totient is φ = 47720290.

The previous prime is 47720273. The next prime is 47720297. The reversal of 47720291 is 19202774.

47720291 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 47720291 - 2⁶ = 47720227 is a prime.

It is a Chen prime.

It is equal to p_2872346 and since 47720291 and 2872346 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (47720297) 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, 23860145 + 23860146.

It is an arithmetic number, because the mean of its divisors is an integer number (23860146).

Almost surely, 2^47720291 is an apocalyptic number.

47720291 is a deficient number, since it is larger than the sum of its proper divisors (1).

47720291 is an equidigital number, since it uses as much as digits as its factorization.

47720291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 47720291 is about 6907.9874782747. The cubic root of 47720291 is about 362.7168193186.

The spelling of 47720291 in words is "forty-seven million, seven hundred twenty thousand, two hundred ninety-one".