47947829 has 2 divisors, whose sum is σ = 47947830. Its totient is φ = 47947828.

The previous prime is 47947807. The next prime is 47947843. The reversal of 47947829 is 92874974.

47947829 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 can be written as a sum of positive squares in only one way, i.e., 34456900 + 13490929 = 5870^2 + 3673^2 .

It is a cyclic number.

It is not a de Polignac number, because 47947829 - 2¹⁶ = 47882293 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47947859) 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, 23973914 + 23973915.

It is an arithmetic number, because the mean of its divisors is an integer number (23973915).

Almost surely, 2^47947829 is an apocalyptic number.

It is an amenable number.

47947829 is a deficient number, since it is larger than the sum of its proper divisors (1).

47947829 is an equidigital number, since it uses as much as digits as its factorization.

47947829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 50.

The square root of 47947829 is about 6924.4370890347. The cubic root of 47947829 is about 363.2924027810.

The spelling of 47947829 in words is "forty-seven million, nine hundred forty-seven thousand, eight hundred twenty-nine".