434405509 has 2 divisors, whose sum is σ = 434405510. Its totient is φ = 434405508.

The previous prime is 434405473. The next prime is 434405513. The reversal of 434405509 is 905504434.

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., 323208484 + 111197025 = 17978^2 + 10545^2 .

It is a cyclic number.

It is not a de Polignac number, because 434405509 - 2¹³ = 434397317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434405519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217202754 + 217202755.

It is an arithmetic number, because the mean of its divisors is an integer number (217202755).

Almost surely, 2^434405509 is an apocalyptic number.

It is an amenable number.

434405509 is a deficient number, since it is larger than the sum of its proper divisors (1).

434405509 is an equidigital number, since it uses as much as digits as its factorization.

434405509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 434405509 is about 20842.3969111041. The cubic root of 434405509 is about 757.3531592781.

The spelling of 434405509 in words is "four hundred thirty-four million, four hundred five thousand, five hundred nine".