330409 has 2 divisors, whose sum is σ = 330410. Its totient is φ = 330408.

The previous prime is 330389. The next prime is 330413. The reversal of 330409 is 904033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291600 + 38809 = 540^2 + 197^2 .

It is a cyclic number.

It is not a de Polignac number, because 330409 - 2¹⁵ = 297641 is a prime.

It is a nialpdrome in base 9 and base 13.

It is not a weakly prime, because it can be changed into another prime (330439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165204 + 165205.

It is an arithmetic number, because the mean of its divisors is an integer number (165205).

2³³⁰⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

330409 is a deficient number, since it is larger than the sum of its proper divisors (1).

330409 is an equidigital number, since it uses as much as digits as its factorization.

330409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 330409 is about 574.8121432259. The cubic root of 330409 is about 69.1327696359.

The spelling of 330409 in words is "three hundred thirty thousand, four hundred nine".