206388929 has 2 divisors, whose sum is σ = 206388930. Its totient is φ = 206388928.

The previous prime is 206388901. The next prime is 206388947. The reversal of 206388929 is 929883602.

206388929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194658304 + 11730625 = 13952^2 + 3425^2 .

It is a cyclic number.

It is not a de Polignac number, because 206388929 - 2¹² = 206384833 is a prime.

It is not a weakly prime, because it can be changed into another prime (206388529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103194464 + 103194465.

It is an arithmetic number, because the mean of its divisors is an integer number (103194465).

Almost surely, 2^206388929 is an apocalyptic number.

It is an amenable number.

206388929 is a deficient number, since it is larger than the sum of its proper divisors (1).

206388929 is an equidigital number, since it uses as much as digits as its factorization.

206388929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 206388929 is about 14366.2426890262. The cubic root of 206388929 is about 590.9655061784.

The spelling of 206388929 in words is "two hundred six million, three hundred eighty-eight thousand, nine hundred twenty-nine".