1389377271 has 8 divisors (see below), whose sum is σ = 1856060784. Its totient is φ = 924472640.

The previous prime is 1389377263. The next prime is 1389377273. The reversal of 1389377271 is 1727739831.

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 1389377271 - 2³ = 1389377263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1389377271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389377273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442896 + ... + 446021.

It is an arithmetic number, because the mean of its divisors is an integer number (232007598).

Almost surely, 2^1389377271 is an apocalyptic number.

1389377271 is a deficient number, since it is larger than the sum of its proper divisors (466683513).

1389377271 is an equidigital number, since it uses as much as digits as its factorization.

1389377271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889441.

The product of its digits is 444528, while the sum is 48.

The square root of 1389377271 is about 37274.3513826867. The cubic root of 1389377271 is about 1115.8523437758.

The spelling of 1389377271 in words is "one billion, three hundred eighty-nine million, three hundred seventy-seven thousand, two hundred seventy-one".