1389839 has 4 divisors (see below), whose sum is σ = 1516200. Its totient is φ = 1263480.

The previous prime is 1389833. The next prime is 1389841. The reversal of 1389839 is 9389831.

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

It is a cyclic number.

It is not a de Polignac number, because 1389839 - 2¹² = 1385743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1389796 and 1389805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389833) by changing a digit.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63164 + ... + 63185.

It is an arithmetic number, because the mean of its divisors is an integer number (379050).

2^1389839 is an apocalyptic number.

1389839 is a deficient number, since it is larger than the sum of its proper divisors (126361).

1389839 is a wasteful number, since it uses less digits than its factorization.

1389839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126360.

The product of its digits is 46656, while the sum is 41.

The square root of 1389839 is about 1178.9143310691. The cubic root of 1389839 is about 111.5975939753.

The spelling of 1389839 in words is "one million, three hundred eighty-nine thousand, eight hundred thirty-nine".