1389360643 has 8 divisors (see below), whose sum is σ = 1516134960. Its totient is φ = 1262664480.

The previous prime is 1389360641. The next prime is 1389360647. The reversal of 1389360643 is 3460639831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1389360643 - 2¹ = 1389360641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1389360643.

It is not an unprimeable number, because it can be changed into a prime (1389360641) 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, 21373 + ... + 56881.

It is an arithmetic number, because the mean of its divisors is an integer number (189516870).

Almost surely, 2^1389360643 is an apocalyptic number.

1389360643 is a deficient number, since it is larger than the sum of its proper divisors (126774317).

1389360643 is a wasteful number, since it uses less digits than its factorization.

1389360643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39077.

The product of its (nonzero) digits is 279936, while the sum is 43.

The square root of 1389360643 is about 37274.1283332018. The cubic root of 1389360643 is about 1115.8478922691.

The spelling of 1389360643 in words is "one billion, three hundred eighty-nine million, three hundred sixty thousand, six hundred forty-three".