1389659 has 4 divisors (see below), whose sum is σ = 1403520. Its totient is φ = 1375800.

The previous prime is 1389643. The next prime is 1389667. The reversal of 1389659 is 9569831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9569831 = 127 ⋅75353.

It is a cyclic number.

It is not a de Polignac number, because 1389659 - 2⁴ = 1389643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389629) 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, 6779 + ... + 6980.

It is an arithmetic number, because the mean of its divisors is an integer number (350880).

2^1389659 is an apocalyptic number.

1389659 is a deficient number, since it is larger than the sum of its proper divisors (13861).

1389659 is a wasteful number, since it uses less digits than its factorization.

1389659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13860.

The product of its digits is 58320, while the sum is 41.

The square root of 1389659 is about 1178.8379871721. The cubic root of 1389659 is about 111.5927760469.

It can be divided in two parts, 1389 and 659, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1389659 in words is "one million, three hundred eighty-nine thousand, six hundred fifty-nine".