127798117 has 2 divisors, whose sum is σ = 127798118. Its totient is φ = 127798116.

The previous prime is 127798109. The next prime is 127798147. The reversal of 127798117 is 711897721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118069956 + 9728161 = 10866^2 + 3119^2 .

It is an emirp because it is prime and its reverse (711897721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127798117 - 2³ = 127798109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127798147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63899058 + 63899059.

It is an arithmetic number, because the mean of its divisors is an integer number (63899059).

Almost surely, 2^127798117 is an apocalyptic number.

It is an amenable number.

127798117 is a deficient number, since it is larger than the sum of its proper divisors (1).

127798117 is an equidigital number, since it uses as much as digits as its factorization.

127798117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 43.

The square root of 127798117 is about 11304.7829258239. The cubic root of 127798117 is about 503.7033257045.

The spelling of 127798117 in words is "one hundred twenty-seven million, seven hundred ninety-eight thousand, one hundred seventeen".