206730529 has 2 divisors, whose sum is σ = 206730530. Its totient is φ = 206730528.

The previous prime is 206730481. The next prime is 206730539. The reversal of 206730529 is 925037602.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206698129 + 32400 = 14377^2 + 180^2 .

It is a cyclic number.

It is not a de Polignac number, because 206730529 - 2²³ = 198341921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206730494 and 206730503.

It is not a weakly prime, because it can be changed into another prime (206730539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103365264 + 103365265.

It is an arithmetic number, because the mean of its divisors is an integer number (103365265).

Almost surely, 2^206730529 is an apocalyptic number.

It is an amenable number.

206730529 is a deficient number, since it is larger than the sum of its proper divisors (1).

206730529 is an equidigital number, since it uses as much as digits as its factorization.

206730529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 206730529 is about 14378.1267555965. The cubic root of 206730529 is about 591.2913675582.

The spelling of 206730529 in words is "two hundred six million, seven hundred thirty thousand, five hundred twenty-nine".