47642971 has 2 divisors, whose sum is σ = 47642972. Its totient is φ = 47642970.

The previous prime is 47642957. The next prime is 47642981. The reversal of 47642971 is 17924674.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47642971 - 2⁷ = 47642843 is a prime.

It is not a weakly prime, because it can be changed into another prime (47642921) 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, 23821485 + 23821486.

It is an arithmetic number, because the mean of its divisors is an integer number (23821486).

Almost surely, 2^47642971 is an apocalyptic number.

47642971 is a deficient number, since it is larger than the sum of its proper divisors (1).

47642971 is an equidigital number, since it uses as much as digits as its factorization.

47642971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 40.

The square root of 47642971 is about 6902.3887893975. The cubic root of 47642971 is about 362.5208130737.

The spelling of 47642971 in words is "forty-seven million, six hundred forty-two thousand, nine hundred seventy-one".