206117 has 4 divisors (see below), whose sum is σ = 210060. Its totient is φ = 202176.

The previous prime is 206083. The next prime is 206123. The reversal of 206117 is 711602.

It is a happy number.

It is a Cunningham number, because it is equal to 454²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 148996 + 57121 = 386^2 + 239^2 .

It is a cyclic number.

It is not a de Polignac number, because 206117 - 2¹² = 202021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206095 and 206104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206177) 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, 1892 + ... + 1997.

It is an arithmetic number, because the mean of its divisors is an integer number (52515).

2²⁰⁶¹¹⁷ is an apocalyptic number.

It is an amenable number.

206117 is a deficient number, since it is larger than the sum of its proper divisors (3943).

206117 is an equidigital number, since it uses as much as digits as its factorization.

206117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3942.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 206117 is about 454.0011013203. The cubic root of 206117 is about 59.0705848697.

Adding to 206117 its reverse (711602), we get a palindrome (917719).

It can be divided in two parts, 206 and 117, that added together give a palindrome (323).

The spelling of 206117 in words is "two hundred six thousand, one hundred seventeen".