205136829 has 6 divisors (see below), whose sum is σ = 296308766. Its totient is φ = 136757880.

The previous prime is 205136809. The next prime is 205136831. The reversal of 205136829 is 928631502.

It can be written as a sum of positive squares in only one way, i.e., 198387225 + 6749604 = 14085^2 + 2598^2 .

It is not a de Polignac number, because 205136829 - 2⁵ = 205136797 is a prime.

It is a super-2 number, since 2×205136829² = 84162237224350482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 205136793 and 205136802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205136809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11396482 + ... + 11396499.

Almost surely, 2^205136829 is an apocalyptic number.

It is an amenable number.

205136829 is a deficient number, since it is larger than the sum of its proper divisors (91171937).

205136829 is a wasteful number, since it uses less digits than its factorization.

205136829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22792987 (or 22792984 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 205136829 is about 14322.5985421641. The cubic root of 205136829 is about 589.7680108713.

The spelling of 205136829 in words is "two hundred five million, one hundred thirty-six thousand, eight hundred twenty-nine".