127993935317 has 2 divisors, whose sum is σ = 127993935318. Its totient is φ = 127993935316.

The previous prime is 127993935269. The next prime is 127993935331. The reversal of 127993935317 is 713539399721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121554033316 + 6439902001 = 348646^2 + 80249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127993935317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127993935397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63996967658 + 63996967659.

It is an arithmetic number, because the mean of its divisors is an integer number (63996967659).

Almost surely, 2^127993935317 is an apocalyptic number.

It is an amenable number.

127993935317 is a deficient number, since it is larger than the sum of its proper divisors (1).

127993935317 is an equidigital number, since it uses as much as digits as its factorization.

127993935317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9644670, while the sum is 59.

The spelling of 127993935317 in words is "one hundred twenty-seven billion, nine hundred ninety-three million, nine hundred thirty-five thousand, three hundred seventeen".