127492890887 has 4 divisors (see below), whose sum is σ = 133036060080. Its totient is φ = 121949721696.

The previous prime is 127492890779. The next prime is 127492890913. The reversal of 127492890887 is 788098294721.

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 127492890887 - 2²⁰ = 127491842311 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 (127492896887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2771584562 + ... + 2771584607.

It is an arithmetic number, because the mean of its divisors is an integer number (33259015020).

Almost surely, 2^127492890887 is an apocalyptic number.

127492890887 is a deficient number, since it is larger than the sum of its proper divisors (5543169193).

127492890887 is an equidigital number, since it uses as much as digits as its factorization.

127492890887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5543169192.

The product of its (nonzero) digits is 32514048, while the sum is 65.

The spelling of 127492890887 in words is "one hundred twenty-seven billion, four hundred ninety-two million, eight hundred ninety thousand, eight hundred eighty-seven".