206191267 has 4 divisors (see below), whose sum is σ = 208083040. Its totient is φ = 204299496.

The previous prime is 206191259. The next prime is 206191301. The reversal of 206191267 is 762191602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 206191267 - 2³ = 206191259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206191967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 945723 + ... + 945940.

It is an arithmetic number, because the mean of its divisors is an integer number (52020760).

Almost surely, 2^206191267 is an apocalyptic number.

206191267 is a deficient number, since it is larger than the sum of its proper divisors (1891773).

206191267 is a wasteful number, since it uses less digits than its factorization.

206191267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891772.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 206191267 is about 14359.3616501570. The cubic root of 206191267 is about 590.7767868593.

The spelling of 206191267 in words is "two hundred six million, one hundred ninety-one thousand, two hundred sixty-seven".