206922189 has 4 divisors (see below), whose sum is σ = 275896256. Its totient is φ = 137948124.

The previous prime is 206922169. The next prime is 206922193. The reversal of 206922189 is 981229602.

206922189 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 not a de Polignac number, because 206922189 - 2²⁵ = 173367757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206922119) 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, 34487029 + ... + 34487034.

It is an arithmetic number, because the mean of its divisors is an integer number (68974064).

Almost surely, 2^206922189 is an apocalyptic number.

It is an amenable number.

206922189 is a deficient number, since it is larger than the sum of its proper divisors (68974067).

206922189 is an equidigital number, since it uses as much as digits as its factorization.

206922189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68974066.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 206922189 is about 14384.7901965931. The cubic root of 206922189 is about 591.4740399809.

The spelling of 206922189 in words is "two hundred six million, nine hundred twenty-two thousand, one hundred eighty-nine".