47509769917 has 2 divisors, whose sum is σ = 47509769918. Its totient is φ = 47509769916.

The previous prime is 47509769891. The next prime is 47509769921. The reversal of 47509769917 is 71996790574.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28500530041 + 19009239876 = 168821^2 + 137874^2 .

It is a cyclic number.

It is not a de Polignac number, because 47509769917 - 2³⁵ = 13150031549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47509709917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23754884958 + 23754884959.

It is an arithmetic number, because the mean of its divisors is an integer number (23754884959).

Almost surely, 2^47509769917 is an apocalyptic number.

It is an amenable number.

47509769917 is a deficient number, since it is larger than the sum of its proper divisors (1).

47509769917 is an equidigital number, since it uses as much as digits as its factorization.

47509769917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30005640, while the sum is 64.

The spelling of 47509769917 in words is "forty-seven billion, five hundred nine million, seven hundred sixty-nine thousand, nine hundred seventeen".