127317479491 has 4 divisors (see below), whose sum is σ = 127592463712. Its totient is φ = 127042495272.

The previous prime is 127317479473. The next prime is 127317479543. The reversal of 127317479491 is 194974713721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194974713721 = 102761 ⋅1897361.

It is a cyclic number.

It is not a de Polignac number, because 127317479491 - 2⁹ = 127317478979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127317479461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137491416 + ... + 137492341.

It is an arithmetic number, because the mean of its divisors is an integer number (31898115928).

Almost surely, 2^127317479491 is an apocalyptic number.

127317479491 is a deficient number, since it is larger than the sum of its proper divisors (274984221).

127317479491 is an equidigital number, since it uses as much as digits as its factorization.

127317479491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274984220.

The product of its digits is 2667168, while the sum is 55.

The spelling of 127317479491 in words is "one hundred twenty-seven billion, three hundred seventeen million, four hundred seventy-nine thousand, four hundred ninety-one".