127987274397 has 4 divisors (see below), whose sum is σ = 170649699200. Its totient is φ = 85324849596.

The previous prime is 127987274377. The next prime is 127987274419. The reversal of 127987274397 is 793472789721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 127987274397 - 2¹⁰ = 127987273373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127987274377) 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, 21331212397 + ... + 21331212402.

It is an arithmetic number, because the mean of its divisors is an integer number (42662424800).

Almost surely, 2^127987274397 is an apocalyptic number.

It is an amenable number.

127987274397 is a deficient number, since it is larger than the sum of its proper divisors (42662424803).

127987274397 is an equidigital number, since it uses as much as digits as its factorization.

127987274397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42662424802.

The product of its digits is 74680704, while the sum is 66.

The spelling of 127987274397 in words is "one hundred twenty-seven billion, nine hundred eighty-seven million, two hundred seventy-four thousand, three hundred ninety-seven".