206940171 has 4 divisors (see below), whose sum is σ = 275920232. Its totient is φ = 137960112.

The previous prime is 206940163. The next prime is 206940187. The reversal of 206940171 is 171049602.

It is a happy number.

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

It is not a de Polignac number, because 206940171 - 2³ = 206940163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206940871) 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, 34490026 + ... + 34490031.

It is an arithmetic number, because the mean of its divisors is an integer number (68980058).

Almost surely, 2^206940171 is an apocalyptic number.

206940171 is a deficient number, since it is larger than the sum of its proper divisors (68980061).

206940171 is an equidigital number, since it uses as much as digits as its factorization.

206940171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68980060.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 206940171 is about 14385.4152181993. The cubic root of 206940171 is about 591.4911729560.

Adding to 206940171 its reverse (171049602), we get a palindrome (377989773).

The spelling of 206940171 in words is "two hundred six million, nine hundred forty thousand, one hundred seventy-one".