434509 has 2 divisors, whose sum is σ = 434510. Its totient is φ = 434508.

The previous prime is 434501. The next prime is 434521. The reversal of 434509 is 905434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 426409 + 8100 = 653^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 434509 - 2³ = 434501 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217254 + 217255.

It is an arithmetic number, because the mean of its divisors is an integer number (217255).

2⁴³⁴⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

434509 is a deficient number, since it is larger than the sum of its proper divisors (1).

434509 is an equidigital number, since it uses as much as digits as its factorization.

434509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 434509 is about 659.1729666787. The cubic root of 434509 is about 75.7413297414.

The spelling of 434509 in words is "four hundred thirty-four thousand, five hundred nine".