127134764917 has 2 divisors, whose sum is σ = 127134764918. Its totient is φ = 127134764916.

The previous prime is 127134764909. The next prime is 127134764951. The reversal of 127134764917 is 719467431721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66651232561 + 60483532356 = 258169^2 + 245934^2 .

It is a cyclic number.

It is not a de Polignac number, because 127134764917 - 2³ = 127134764909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127134764957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63567382458 + 63567382459.

It is an arithmetic number, because the mean of its divisors is an integer number (63567382459).

Almost surely, 2^127134764917 is an apocalyptic number.

It is an amenable number.

127134764917 is a deficient number, since it is larger than the sum of its proper divisors (1).

127134764917 is an equidigital number, since it uses as much as digits as its factorization.

127134764917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 52.

The spelling of 127134764917 in words is "one hundred twenty-seven billion, one hundred thirty-four million, seven hundred sixty-four thousand, nine hundred seventeen".