205136429 has 2 divisors, whose sum is σ = 205136430. Its totient is φ = 205136428.

The previous prime is 205136417. The next prime is 205136443. The reversal of 205136429 is 924631502.

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., 201583204 + 3553225 = 14198^2 + 1885^2 .

It is a cyclic number.

It is not a de Polignac number, because 205136429 - 2⁴ = 205136413 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 205136395 and 205136404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205136929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102568214 + 102568215.

It is an arithmetic number, because the mean of its divisors is an integer number (102568215).

Almost surely, 2^205136429 is an apocalyptic number.

It is an amenable number.

205136429 is a deficient number, since it is larger than the sum of its proper divisors (1).

205136429 is an equidigital number, since it uses as much as digits as its factorization.

205136429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 205136429 is about 14322.5845782107. The cubic root of 205136429 is about 589.7676275380.

The spelling of 205136429 in words is "two hundred five million, one hundred thirty-six thousand, four hundred twenty-nine".