205030429 has 2 divisors, whose sum is σ = 205030430. Its totient is φ = 205030428.

The previous prime is 205030411. The next prime is 205030471. The reversal of 205030429 is 924030502.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175032900 + 29997529 = 13230^2 + 5477^2 .

It is a cyclic number.

It is not a de Polignac number, because 205030429 - 2²³ = 196641821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205030499) 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, 102515214 + 102515215.

It is an arithmetic number, because the mean of its divisors is an integer number (102515215).

Almost surely, 2^205030429 is an apocalyptic number.

It is an amenable number.

205030429 is a deficient number, since it is larger than the sum of its proper divisors (1).

205030429 is an equidigital number, since it uses as much as digits as its factorization.

205030429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 205030429 is about 14318.8836506203. The cubic root of 205030429 is about 589.6660266347. Note that the first 3 decimals are identical.

The spelling of 205030429 in words is "two hundred five million, thirty thousand, four hundred twenty-nine".