434143309 has 2 divisors, whose sum is σ = 434143310. Its totient is φ = 434143308.

The previous prime is 434143289. The next prime is 434143321. The reversal of 434143309 is 903341434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 431725284 + 2418025 = 20778^2 + 1555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-434143309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434146309) 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, 217071654 + 217071655.

It is an arithmetic number, because the mean of its divisors is an integer number (217071655).

Almost surely, 2^434143309 is an apocalyptic number.

It is an amenable number.

434143309 is a deficient number, since it is larger than the sum of its proper divisors (1).

434143309 is an equidigital number, since it uses as much as digits as its factorization.

434143309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 434143309 is about 20836.1058981759. The cubic root of 434143309 is about 757.2007533191.

The spelling of 434143309 in words is "four hundred thirty-four million, one hundred forty-three thousand, three hundred nine".