127928839 has 4 divisors (see below), whose sum is σ = 128154240. Its totient is φ = 127703440.

The previous prime is 127928821. The next prime is 127928851. The reversal of 127928839 is 938829721.

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 127928839 - 2¹⁷ = 127797767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 127928792 and 127928801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127928239) 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, 111847 + ... + 112984.

It is an arithmetic number, because the mean of its divisors is an integer number (32038560).

Almost surely, 2^127928839 is an apocalyptic number.

127928839 is a deficient number, since it is larger than the sum of its proper divisors (225401).

127928839 is an equidigital number, since it uses as much as digits as its factorization.

127928839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225400.

The product of its digits is 435456, while the sum is 49.

The square root of 127928839 is about 11310.5631601614. The cubic root of 127928839 is about 503.8750096852.

The spelling of 127928839 in words is "one hundred twenty-seven million, nine hundred twenty-eight thousand, eight hundred thirty-nine".