1389019859 has 4 divisors (see below), whose sum is σ = 1389583104. Its totient is φ = 1388456616.

The previous prime is 1389019829. The next prime is 1389019889. The reversal of 1389019859 is 9589109831.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1389019829) and next prime (1389019889).

It is a cyclic number.

It is not a de Polignac number, because 1389019859 - 2⁸ = 1389019603 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 1389019859.

It is not an unprimeable number, because it can be changed into a prime (1389019829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277907 + ... + 282860.

It is an arithmetic number, because the mean of its divisors is an integer number (347395776).

Almost surely, 2^1389019859 is an apocalyptic number.

1389019859 is a deficient number, since it is larger than the sum of its proper divisors (563245).

1389019859 is an equidigital number, since it uses as much as digits as its factorization.

1389019859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563244.

The product of its (nonzero) digits is 699840, while the sum is 53.

The square root of 1389019859 is about 37269.5567320031. The cubic root of 1389019859 is about 1115.7566526511.

The spelling of 1389019859 in words is "one billion, three hundred eighty-nine million, nineteen thousand, eight hundred fifty-nine".