47664847 has 2 divisors, whose sum is σ = 47664848. Its totient is φ = 47664846.

The previous prime is 47664833. The next prime is 47664853. The reversal of 47664847 is 74846674.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47664847 - 2¹¹ = 47662799 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 47664797 and 47664806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47664817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23832423 + 23832424.

It is an arithmetic number, because the mean of its divisors is an integer number (23832424).

Almost surely, 2^47664847 is an apocalyptic number.

47664847 is a deficient number, since it is larger than the sum of its proper divisors (1).

47664847 is an equidigital number, since it uses as much as digits as its factorization.

47664847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168, while the sum is 46.

The square root of 47664847 is about 6903.9732763098. The cubic root of 47664847 is about 362.5762902452.

The spelling of 47664847 in words is "forty-seven million, six hundred sixty-four thousand, eight hundred forty-seven".