434681509 has 2 divisors, whose sum is σ = 434681510. Its totient is φ = 434681508.

The previous prime is 434681479. The next prime is 434681537. The reversal of 434681509 is 905186434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 434597409 + 84100 = 20847^2 + 290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-434681509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434681579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217340754 + 217340755.

It is an arithmetic number, because the mean of its divisors is an integer number (217340755).

Almost surely, 2^434681509 is an apocalyptic number.

It is an amenable number.

434681509 is a deficient number, since it is larger than the sum of its proper divisors (1).

434681509 is an equidigital number, since it uses as much as digits as its factorization.

434681509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 434681509 is about 20849.0169792247. The cubic root of 434681509 is about 757.5135203649.

The spelling of 434681509 in words is "four hundred thirty-four million, six hundred eighty-one thousand, five hundred nine".