1329909 has 24 divisors (see below), whose sum is σ = 2106720. Its totient is φ = 743904.

The previous prime is 1329907. The next prime is 1329941. The reversal of 1329909 is 9099231.

It is not a de Polignac number, because 1329909 - 2¹ = 1329907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1329909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329907) 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 23 ways as a sum of consecutive naturals, for example, 12147 + ... + 12255.

It is an arithmetic number, because the mean of its divisors is an integer number (87780).

2^1329909 is an apocalyptic number.

It is an amenable number.

1329909 is a deficient number, since it is larger than the sum of its proper divisors (776811).

1329909 is a wasteful number, since it uses less digits than its factorization.

1329909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 1329909 is about 1153.2168052886. The cubic root of 1329909 is about 109.9699366879.

The spelling of 1329909 in words is "one million, three hundred twenty-nine thousand, nine hundred nine".