509429 has 2 divisors, whose sum is σ = 509430. Its totient is φ = 509428.

The previous prime is 509417. The next prime is 509441. The reversal of 509429 is 924905.

It is a balanced prime because it is at equal distance from previous prime (509417) and next prime (509441).

It can be written as a sum of positive squares in only one way, i.e., 504100 + 5329 = 710^2 + 73^2 .

It is a cyclic number.

It is not a de Polignac number, because 509429 - 2⁴ = 509413 is a prime.

It is a Sophie Germain 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 (509449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254714 + 254715.

It is an arithmetic number, because the mean of its divisors is an integer number (254715).

2⁵⁰⁹⁴²⁹ is an apocalyptic number.

It is an amenable number.

509429 is a deficient number, since it is larger than the sum of its proper divisors (1).

509429 is an equidigital number, since it uses as much as digits as its factorization.

509429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 509429 is about 713.7429509284. The cubic root of 509429 is about 79.8658689866.

The spelling of 509429 in words is "five hundred nine thousand, four hundred twenty-nine".