47717321 has 2 divisors, whose sum is σ = 47717322. Its totient is φ = 47717320.

The previous prime is 47717297. The next prime is 47717357. The reversal of 47717321 is 12371774.

47717321 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 can be written as a sum of positive squares in only one way, i.e., 47059600 + 657721 = 6860^2 + 811^2 .

It is a cyclic number.

It is not a de Polignac number, because 47717321 - 2¹⁴ = 47700937 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (47717221) 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, 23858660 + 23858661.

It is an arithmetic number, because the mean of its divisors is an integer number (23858661).

Almost surely, 2^47717321 is an apocalyptic number.

It is an amenable number.

47717321 is a deficient number, since it is larger than the sum of its proper divisors (1).

47717321 is an equidigital number, since it uses as much as digits as its factorization.

47717321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8232, while the sum is 32.

The square root of 47717321 is about 6907.7725063873. The cubic root of 47717321 is about 362.7092942786.

The spelling of 47717321 in words is "forty-seven million, seven hundred seventeen thousand, three hundred twenty-one".