127913115217 has 2 divisors, whose sum is σ = 127913115218. Its totient is φ = 127913115216.

The previous prime is 127913115163. The next prime is 127913115289. The reversal of 127913115217 is 712511319721.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96768277776 + 31144837441 = 311076^2 + 176479^2 .

It is a cyclic number.

It is not a de Polignac number, because 127913115217 - 2³¹ = 125765631569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127913115217.

It is not a weakly prime, because it can be changed into another prime (127913115017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63956557608 + 63956557609.

It is an arithmetic number, because the mean of its divisors is an integer number (63956557609).

Almost surely, 2^127913115217 is an apocalyptic number.

It is an amenable number.

127913115217 is a deficient number, since it is larger than the sum of its proper divisors (1).

127913115217 is an equidigital number, since it uses as much as digits as its factorization.

127913115217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 40.

The spelling of 127913115217 in words is "one hundred twenty-seven billion, nine hundred thirteen million, one hundred fifteen thousand, two hundred seventeen".