434423309 has 2 divisors, whose sum is σ = 434423310. Its totient is φ = 434423308.

The previous prime is 434423299. The next prime is 434423323. The reversal of 434423309 is 903324434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309654409 + 124768900 = 17597^2 + 11170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-434423309 is a prime.

It is a super-2 number, since 2×434423309² = 377447222805018962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434423359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217211654 + 217211655.

It is an arithmetic number, because the mean of its divisors is an integer number (217211655).

Almost surely, 2^434423309 is an apocalyptic number.

It is an amenable number.

434423309 is a deficient number, since it is larger than the sum of its proper divisors (1).

434423309 is an equidigital number, since it uses as much as digits as its factorization.

434423309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 434423309 is about 20842.8239209566. The cubic root of 434423309 is about 757.3635034549.

The spelling of 434423309 in words is "four hundred thirty-four million, four hundred twenty-three thousand, three hundred nine".