127705389 has 16 divisors (see below), whose sum is σ = 199859328. Its totient is φ = 71001792.

The previous prime is 127705387. The next prime is 127705393. The reversal of 127705389 is 983507721.

It is not a de Polignac number, because 127705389 - 2¹ = 127705387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127705389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127705387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81402 + ... + 82955.

It is an arithmetic number, because the mean of its divisors is an integer number (12491208).

Almost surely, 2^127705389 is an apocalyptic number.

It is an amenable number.

127705389 is a deficient number, since it is larger than the sum of its proper divisors (72153939).

127705389 is a wasteful number, since it uses less digits than its factorization.

127705389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164404.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 127705389 is about 11300.6809086886. The cubic root of 127705389 is about 503.5814702231.

The spelling of 127705389 in words is "one hundred twenty-seven million, seven hundred five thousand, three hundred eighty-nine".