47664871 has 2 divisors, whose sum is σ = 47664872. Its totient is φ = 47664870.

The previous prime is 47664853. The next prime is 47664913. The reversal of 47664871 is 17846674.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47664871 - 2¹⁷ = 47533799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47662871) 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, 23832435 + 23832436.

It is an arithmetic number, because the mean of its divisors is an integer number (23832436).

Almost surely, 2^47664871 is an apocalyptic number.

47664871 is a deficient number, since it is larger than the sum of its proper divisors (1).

47664871 is an equidigital number, since it uses as much as digits as its factorization.

47664871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 43.

The square root of 47664871 is about 6903.9750144391. The cubic root of 47664871 is about 362.5763510994.

The spelling of 47664871 in words is "forty-seven million, six hundred sixty-four thousand, eight hundred seventy-one".