127389 has 4 divisors (see below), whose sum is σ = 169856. Its totient is φ = 84924.

The previous prime is 127373. The next prime is 127399. The reversal of 127389 is 983721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 127389 - 2⁴ = 127373 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21229 + ... + 21234.

It is an arithmetic number, because the mean of its divisors is an integer number (42464).

2¹²⁷³⁸⁹ is an apocalyptic number.

It is an amenable number.

127389 is a deficient number, since it is larger than the sum of its proper divisors (42467).

127389 is an equidigital number, since it uses as much as digits as its factorization.

127389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42466.

The product of its digits is 3024, while the sum is 30.

The square root of 127389 is about 356.9159564940. The cubic root of 127389 is about 50.3165253392.

The spelling of 127389 in words is "one hundred twenty-seven thousand, three hundred eighty-nine".