434420309 has 2 divisors, whose sum is σ = 434420310. Its totient is φ = 434420308.

The previous prime is 434420281. The next prime is 434420333. The reversal of 434420309 is 903024434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 337456900 + 96963409 = 18370^2 + 9847^2 .

It is a cyclic number.

It is not a de Polignac number, because 434420309 - 2⁸ = 434420053 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434420339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217210154 + 217210155.

It is an arithmetic number, because the mean of its divisors is an integer number (217210155).

Almost surely, 2^434420309 is an apocalyptic number.

It is an amenable number.

434420309 is a deficient number, since it is larger than the sum of its proper divisors (1).

434420309 is an equidigital number, since it uses as much as digits as its factorization.

434420309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 434420309 is about 20842.7519536169. The cubic root of 434420309 is about 757.3617600741.

The spelling of 434420309 in words is "four hundred thirty-four million, four hundred twenty thousand, three hundred nine".