127917913 has 2 divisors, whose sum is σ = 127917914. Its totient is φ = 127917912.

The previous prime is 127917901. The next prime is 127917943. The reversal of 127917913 is 319719721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108097609 + 19820304 = 10397^2 + 4452^2 .

It is an emirp because it is prime and its reverse (319719721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127917913 - 2¹³ = 127909721 is a prime.

It is not a weakly prime, because it can be changed into another prime (127917943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63958956 + 63958957.

It is an arithmetic number, because the mean of its divisors is an integer number (63958957).

Almost surely, 2^127917913 is an apocalyptic number.

It is an amenable number.

127917913 is a deficient number, since it is larger than the sum of its proper divisors (1).

127917913 is an equidigital number, since it uses as much as digits as its factorization.

127917913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 40.

The square root of 127917913 is about 11310.0801500255. The cubic root of 127917913 is about 503.8606644833.

The spelling of 127917913 in words is "one hundred twenty-seven million, nine hundred seventeen thousand, nine hundred thirteen".