1330309 has 2 divisors, whose sum is σ = 1330310. Its totient is φ = 1330308.

The previous prime is 1330253. The next prime is 1330313. The reversal of 1330309 is 9030331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1329409 + 900 = 1153^2 + 30^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330309 - 2¹³ = 1322117 is a prime.

It is a Chen prime.

It is an Ulam number.

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, 665154 + 665155.

It is an arithmetic number, because the mean of its divisors is an integer number (665155).

2^1330309 is an apocalyptic number.

It is an amenable number.

1330309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330309 is an equidigital number, since it uses as much as digits as its factorization.

1330309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 19.

The square root of 1330309 is about 1153.3902201770. The cubic root of 1330309 is about 109.9809608922.

The spelling of 1330309 in words is "one million, three hundred thirty thousand, three hundred nine".