206771 has 4 divisors (see below), whose sum is σ = 218952. Its totient is φ = 194592.
The previous prime is 206749. The next prime is 206779. The reversal of 206771 is 177602.
It is a happy number.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 177602 = 2 ⋅88801.
It is a cyclic number.
It is not a de Polignac number, because 206771 - 214 = 190387 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (206779) 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, 6065 + ... + 6098.
It is an arithmetic number, because the mean of its divisors is an integer number (54738).
2206771 is an apocalyptic number.
206771 is a deficient number, since it is larger than the sum of its proper divisors (12181).
206771 is a wasteful number, since it uses less digits than its factorization.
206771 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 12180.
The product of its (nonzero) digits is 588, while the sum is 23.
The square root of 206771 is about 454.7207934546. The cubic root of 206771 is about 59.1329950138.
The spelling of 206771 in words is "two hundred six thousand, seven hundred seventy-one".
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