128247587927 has 4 divisors (see below), whose sum is σ = 128475381720. Its totient is φ = 128019794136.

The previous prime is 128247587887. The next prime is 128247587933. The reversal of 128247587927 is 729785742821.

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 128247587927 - 2¹⁸ = 128247325783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128247587927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128247587957) 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, 113896052 + ... + 113897177.

It is an arithmetic number, because the mean of its divisors is an integer number (32118845430).

Almost surely, 2^128247587927 is an apocalyptic number.

128247587927 is a deficient number, since it is larger than the sum of its proper divisors (227793793).

128247587927 is an equidigital number, since it uses as much as digits as its factorization.

128247587927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227793792.

The product of its digits is 31610880, while the sum is 62.

The spelling of 128247587927 in words is "one hundred twenty-eight billion, two hundred forty-seven million, five hundred eighty-seven thousand, nine hundred twenty-seven".