1323989 has 4 divisors (see below), whose sum is σ = 1326924. Its totient is φ = 1321056.

The previous prime is 1323967. The next prime is 1323997. The reversal of 1323989 is 9893231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9893231 = 997 ⋅9923.

It can be written as a sum of positive squares in 2 ways, for example, as 293764 + 1030225 = 542^2 + 1015^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323989 - 2⁸ = 1323733 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 (1323919) 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, 632 + ... + 1745.

It is an arithmetic number, because the mean of its divisors is an integer number (331731).

2^1323989 is an apocalyptic number.

It is an amenable number.

1323989 is a deficient number, since it is larger than the sum of its proper divisors (2935).

1323989 is an equidigital number, since it uses as much as digits as its factorization.

1323989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2934.

The product of its digits is 11664, while the sum is 35.

The square root of 1323989 is about 1150.6472091827. The cubic root of 1323989 is about 109.8065193878.

The spelling of 1323989 in words is "one million, three hundred twenty-three thousand, nine hundred eighty-nine".