205124929 has 4 divisors (see below), whose sum is σ = 210668884. Its totient is φ = 199580976.

The previous prime is 205124903. The next prime is 205124977. The reversal of 205124929 is 929421502.

205124929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 929421502 = 2 ⋅464710751.

It can be written as a sum of positive squares in 2 ways, for example, as 198049329 + 7075600 = 14073^2 + 2660^2 .

It is a cyclic number.

It is not a de Polignac number, because 205124929 - 2²⁷ = 70907201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205124894 and 205124903.

It is not an unprimeable number, because it can be changed into a prime (205124629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2771922 + ... + 2771995.

It is an arithmetic number, because the mean of its divisors is an integer number (52667221).

Almost surely, 2^205124929 is an apocalyptic number.

It is an amenable number.

205124929 is a deficient number, since it is larger than the sum of its proper divisors (5543955).

205124929 is an equidigital number, since it uses as much as digits as its factorization.

205124929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5543954.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 205124929 is about 14322.1831087303. The cubic root of 205124929 is about 589.7566064913.

The spelling of 205124929 in words is "two hundred five million, one hundred twenty-four thousand, nine hundred twenty-nine".