1389289 has 8 divisors (see below), whose sum is σ = 1544832. Its totient is φ = 1238640.

The previous prime is 1389281. The next prime is 1389301. The reversal of 1389289 is 9829831.

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 1389289 - 2³ = 1389281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389281) 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 7 ways as a sum of consecutive naturals, for example, 609 + ... + 1774.

It is an arithmetic number, because the mean of its divisors is an integer number (193104).

2^1389289 is an apocalyptic number.

It is an amenable number.

1389289 is a deficient number, since it is larger than the sum of its proper divisors (155543).

1389289 is a wasteful number, since it uses less digits than its factorization.

1389289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2447.

The product of its digits is 31104, while the sum is 40.

The square root of 1389289 is about 1178.6810425217. The cubic root of 1389289 is about 111.5828712208.

The spelling of 1389289 in words is "one million, three hundred eighty-nine thousand, two hundred eighty-nine".