127928817 has 6 divisors (see below), whose sum is σ = 184786082. Its totient is φ = 85285872.

The previous prime is 127928753. The next prime is 127928821. The reversal of 127928817 is 718829721.

It can be written as a sum of positive squares in only one way, i.e., 85821696 + 42107121 = 9264^2 + 6489^2 .

It is not a de Polignac number, because 127928817 - 2⁶ = 127928753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127928617) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7107148 + ... + 7107165.

Almost surely, 2^127928817 is an apocalyptic number.

It is an amenable number.

127928817 is a deficient number, since it is larger than the sum of its proper divisors (56857265).

127928817 is a wasteful number, since it uses less digits than its factorization.

127928817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14214319 (or 14214316 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 127928817 is about 11310.5621876191. The cubic root of 127928817 is about 503.8749808013.

It can be divided in two parts, 12792 and 8817, that added together give a square (21609 = 147²).

The spelling of 127928817 in words is "one hundred twenty-seven million, nine hundred twenty-eight thousand, eight hundred seventeen".