206108129 has 4 divisors (see below), whose sum is σ = 215069376. Its totient is φ = 197146884.

The previous prime is 206108117. The next prime is 206108131. The reversal of 206108129 is 921801602.

206108129 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206108129 - 2²⁰ = 205059553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206108179) 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, 4480589 + ... + 4480634.

It is an arithmetic number, because the mean of its divisors is an integer number (53767344).

Almost surely, 2^206108129 is an apocalyptic number.

It is an amenable number.

206108129 is a deficient number, since it is larger than the sum of its proper divisors (8961247).

206108129 is an equidigital number, since it uses as much as digits as its factorization.

206108129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8961246.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 206108129 is about 14356.4664524388. The cubic root of 206108129 is about 590.6973741793.

The spelling of 206108129 in words is "two hundred six million, one hundred eight thousand, one hundred twenty-nine".