127172311979 has 8 divisors (see below), whose sum is σ = 129572175360. Its totient is φ = 124792200936.

The previous prime is 127172311967. The next prime is 127172311997. The reversal of 127172311979 is 979113271721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 127172311979 - 2²⁸ = 126903876523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127172311999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4925087 + ... + 4950840.

It is an arithmetic number, because the mean of its divisors is an integer number (16196521920).

Almost surely, 2^127172311979 is an apocalyptic number.

127172311979 is a deficient number, since it is larger than the sum of its proper divisors (2399863381).

127172311979 is an equidigital number, since it uses as much as digits as its factorization.

127172311979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9876169.

The product of its digits is 333396, while the sum is 50.

The spelling of 127172311979 in words is "one hundred twenty-seven billion, one hundred seventy-two million, three hundred eleven thousand, nine hundred seventy-nine".