206152129 has 4 divisors (see below), whose sum is σ = 206811076. Its totient is φ = 205493184.

The previous prime is 206152091. The next prime is 206152153. The reversal of 206152129 is 921251602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921251602 = 2 ⋅460625801.

It can be written as a sum of positive squares in 2 ways, for example, as 2433600 + 203718529 = 1560^2 + 14273^2 .

It is a cyclic number.

It is not a de Polignac number, because 206152129 - 2¹⁹ = 205627841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206152097 and 206152106.

It is not an unprimeable number, because it can be changed into a prime (206152169) 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 in 3 ways as a sum of consecutive naturals, for example, 329004 + ... + 329629.

It is an arithmetic number, because the mean of its divisors is an integer number (51702769).

Almost surely, 2^206152129 is an apocalyptic number.

It is an amenable number.

206152129 is a deficient number, since it is larger than the sum of its proper divisors (658947).

206152129 is an equidigital number, since it uses as much as digits as its factorization.

206152129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658946.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 206152129 is about 14357.9987811672. The cubic root of 206152129 is about 590.7394052486.

The spelling of 206152129 in words is "two hundred six million, one hundred fifty-two thousand, one hundred twenty-nine".