1329889 has 4 divisors (see below), whose sum is σ = 1450800. Its totient is φ = 1208980.

The previous prime is 1329871. The next prime is 1329899. The reversal of 1329889 is 9889231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1329889 - 2⁷ = 1329761 is a prime.

It is a Duffinian number.

1329889 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1329899) 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, 60439 + ... + 60460.

It is an arithmetic number, because the mean of its divisors is an integer number (362700).

2^1329889 is an apocalyptic number.

It is an amenable number.

1329889 is a deficient number, since it is larger than the sum of its proper divisors (120911).

1329889 is a wasteful number, since it uses less digits than its factorization.

1329889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120910.

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

The square root of 1329889 is about 1153.2081338596. The cubic root of 1329889 is about 109.9693854197.

The spelling of 1329889 in words is "one million, three hundred twenty-nine thousand, eight hundred eighty-nine".