206320771 has 4 divisors (see below), whose sum is σ = 207945472. Its totient is φ = 204696072.

The previous prime is 206320757. The next prime is 206320799. The reversal of 206320771 is 177023602.

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 206320771 - 2¹⁹ = 205796483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206320171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812160 + ... + 812413.

It is an arithmetic number, because the mean of its divisors is an integer number (51986368).

Almost surely, 2^206320771 is an apocalyptic number.

206320771 is a deficient number, since it is larger than the sum of its proper divisors (1624701).

206320771 is a wasteful number, since it uses less digits than its factorization.

206320771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624700.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 206320771 is about 14363.8703349759. The cubic root of 206320771 is about 590.9004454184.

The spelling of 206320771 in words is "two hundred six million, three hundred twenty thousand, seven hundred seventy-one".