47478547117 has 2 divisors, whose sum is σ = 47478547118. Its totient is φ = 47478547116.

The previous prime is 47478547099. The next prime is 47478547133. The reversal of 47478547117 is 71174587474.

47478547117 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., 39143039716 + 8335507401 = 197846^2 + 91299^2 .

It is a cyclic number.

It is not a de Polignac number, because 47478547117 - 2¹¹ = 47478545069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47478547177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23739273558 + 23739273559.

It is an arithmetic number, because the mean of its divisors is an integer number (23739273559).

Almost surely, 2^47478547117 is an apocalyptic number.

It is an amenable number.

47478547117 is a deficient number, since it is larger than the sum of its proper divisors (1).

47478547117 is an equidigital number, since it uses as much as digits as its factorization.

47478547117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6146560, while the sum is 55.

It can be divided in two parts, 47478 and 547117, that added together give a triangular number (594595 = T₁₀₉₀).

The spelling of 47478547117 in words is "forty-seven billion, four hundred seventy-eight million, five hundred forty-seven thousand, one hundred seventeen".