1589989 has 4 divisors (see below), whose sum is σ = 1593900. Its totient is φ = 1586080.

The previous prime is 1589981. The next prime is 1590019. The reversal of 1589989 is 9899851.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 173889 + 1416100 = 417^2 + 1190^2 .

It is a cyclic number.

It is not a de Polignac number, because 1589989 - 2³ = 1589981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1589981) 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, 1264 + ... + 2185.

It is an arithmetic number, because the mean of its divisors is an integer number (398475).

2^1589989 is an apocalyptic number.

It is an amenable number.

1589989 is a deficient number, since it is larger than the sum of its proper divisors (3911).

1589989 is an equidigital number, since it uses as much as digits as its factorization.

1589989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910.

The product of its digits is 233280, while the sum is 49.

The square root of 1589989 is about 1260.9476595006. The cubic root of 1589989 is about 116.7162628134.

The spelling of 1589989 in words is "one million, five hundred eighty-nine thousand, nine hundred eighty-nine".