47440217947 has 2 divisors, whose sum is σ = 47440217948. Its totient is φ = 47440217946.

The previous prime is 47440217917. The next prime is 47440217971. The reversal of 47440217947 is 74971204474.

47440217947 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 is a cyclic number.

It is not a de Polignac number, because 47440217947 - 2⁷ = 47440217819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47440217947.

It is not a weakly prime, because it can be changed into another prime (47440217917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23720108973 + 23720108974.

It is an arithmetic number, because the mean of its divisors is an integer number (23720108974).

Almost surely, 2^47440217947 is an apocalyptic number.

47440217947 is a deficient number, since it is larger than the sum of its proper divisors (1).

47440217947 is an equidigital number, since it uses as much as digits as its factorization.

47440217947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1580544, while the sum is 49.

The spelling of 47440217947 in words is "forty-seven billion, four hundred forty million, two hundred seventeen thousand, nine hundred forty-seven".