128700131927 has 4 divisors (see below), whose sum is σ = 128738111160. Its totient is φ = 128662152696.

The previous prime is 128700131909. The next prime is 128700131933. The reversal of 128700131927 is 729131007821.

It is a happy number.

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 128700131927 - 2²⁰ = 128699083351 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 (128700130927) 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, 18984533 + ... + 18991310.

It is an arithmetic number, because the mean of its divisors is an integer number (32184527790).

Almost surely, 2^128700131927 is an apocalyptic number.

128700131927 is a deficient number, since it is larger than the sum of its proper divisors (37979233).

128700131927 is an equidigital number, since it uses as much as digits as its factorization.

128700131927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37979232.

The product of its (nonzero) digits is 42336, while the sum is 41.

The spelling of 128700131927 in words is "one hundred twenty-eight billion, seven hundred million, one hundred thirty-one thousand, nine hundred twenty-seven".