79872127427 has 4 divisors (see below), whose sum is σ = 79909965696. Its totient is φ = 79834289160.

The previous prime is 79872127417. The next prime is 79872127457. The reversal of 79872127427 is 72472127897.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79872127427 - 2¹⁶ = 79872061891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79872127417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18915968 + ... + 18920189.

It is an arithmetic number, because the mean of its divisors is an integer number (19977491424).

Almost surely, 2^79872127427 is an apocalyptic number.

79872127427 is a deficient number, since it is larger than the sum of its proper divisors (37838269).

79872127427 is a wasteful number, since it uses less digits than its factorization.

79872127427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37838268.

The product of its digits is 5531904, while the sum is 56.

The spelling of 79872127427 in words is "seventy-nine billion, eight hundred seventy-two million, one hundred twenty-seven thousand, four hundred twenty-seven".