47689705717 has 2 divisors, whose sum is σ = 47689705718. Its totient is φ = 47689705716.

The previous prime is 47689705669. The next prime is 47689705729. The reversal of 47689705717 is 71750798674.

47689705717 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., 46397590801 + 1292114916 = 215401^2 + 35946^2 .

It is a cyclic number.

It is not a de Polignac number, because 47689705717 - 2²³ = 47681317109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47689700717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23844852858 + 23844852859.

It is an arithmetic number, because the mean of its divisors is an integer number (23844852859).

Almost surely, 2^47689705717 is an apocalyptic number.

It is an amenable number.

47689705717 is a deficient number, since it is larger than the sum of its proper divisors (1).

47689705717 is an equidigital number, since it uses as much as digits as its factorization.

47689705717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20744640, while the sum is 61.

The spelling of 47689705717 in words is "forty-seven billion, six hundred eighty-nine million, seven hundred five thousand, seven hundred seventeen".