1330909 has 2 divisors, whose sum is σ = 1330910. Its totient is φ = 1330908.

The previous prime is 1330873. The next prime is 1330933. The reversal of 1330909 is 9090331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1006009 + 324900 = 1003^2 + 570^2 .

It is an emirp because it is prime and its reverse (9090331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1330909 - 2⁹ = 1330397 is a prime.

1330909 is a modest number, since divided by 909 gives 133 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1330009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665454 + 665455.

It is an arithmetic number, because the mean of its divisors is an integer number (665455).

2^1330909 is an apocalyptic number.

It is an amenable number.

1330909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330909 is an equidigital number, since it uses as much as digits as its factorization.

1330909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 25.

The square root of 1330909 is about 1153.6502936332. The cubic root of 1330909 is about 109.9974930558.

The spelling of 1330909 in words is "one million, three hundred thirty thousand, nine hundred nine".