127879987 has 4 divisors (see below), whose sum is σ = 128522800. Its totient is φ = 127237176.

The previous prime is 127879951. The next prime is 127879993. The reversal of 127879987 is 789978721.

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 127879987 - 2¹⁹ = 127355699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127879387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321108 + ... + 321505.

It is an arithmetic number, because the mean of its divisors is an integer number (32130700).

Almost surely, 2^127879987 is an apocalyptic number.

127879987 is a deficient number, since it is larger than the sum of its proper divisors (642813).

127879987 is an equidigital number, since it uses as much as digits as its factorization.

127879987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642812.

The product of its digits is 3556224, while the sum is 58.

The square root of 127879987 is about 11308.4033797880. The cubic root of 127879987 is about 503.8108635133.

The spelling of 127879987 in words is "one hundred twenty-seven million, eight hundred seventy-nine thousand, nine hundred eighty-seven".