127871993 has 8 divisors (see below), whose sum is σ = 132203520. Its totient is φ = 123553440.

The previous prime is 127871951. The next prime is 127871999. The reversal of 127871993 is 399178721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 127871993 - 2¹⁶ = 127806457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127871999) 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 7 ways as a sum of consecutive naturals, for example, 19421 + ... + 25157.

It is an arithmetic number, because the mean of its divisors is an integer number (16525440).

Almost surely, 2^127871993 is an apocalyptic number.

It is an amenable number.

127871993 is a deficient number, since it is larger than the sum of its proper divisors (4331527).

127871993 is an equidigital number, since it uses as much as digits as its factorization.

127871993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6487.

The product of its digits is 190512, while the sum is 47.

The square root of 127871993 is about 11308.0499203001. The cubic root of 127871993 is about 503.8003652640.

The spelling of 127871993 in words is "one hundred twenty-seven million, eight hundred seventy-one thousand, nine hundred ninety-three".