47647517317 has 2 divisors, whose sum is σ = 47647517318. Its totient is φ = 47647517316.

The previous prime is 47647517263. The next prime is 47647517369. The reversal of 47647517317 is 71371574674.

It is an a-pointer prime, because the next prime (47647517369) can be obtained adding 47647517317 to its sum of digits (52).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43284386401 + 4363130916 = 208049^2 + 66054^2 .

It is a cyclic number.

It is not a de Polignac number, because 47647517317 - 2¹¹ = 47647515269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47647517017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23823758658 + 23823758659.

It is an arithmetic number, because the mean of its divisors is an integer number (23823758659).

Almost surely, 2^47647517317 is an apocalyptic number.

It is an amenable number.

47647517317 is a deficient number, since it is larger than the sum of its proper divisors (1).

47647517317 is an equidigital number, since it uses as much as digits as its factorization.

47647517317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3457440, while the sum is 52.

The spelling of 47647517317 in words is "forty-seven billion, six hundred forty-seven million, five hundred seventeen thousand, three hundred seventeen".