206971 has 4 divisors (see below), whose sum is σ = 208600. Its totient is φ = 205344.

The previous prime is 206953. The next prime is 206993. The reversal of 206971 is 179602.

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 206971 - 2⁵ = 206939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206911) 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, 606 + ... + 883.

It is an arithmetic number, because the mean of its divisors is an integer number (52150).

2²⁰⁶⁹⁷¹ is an apocalyptic number.

206971 is a deficient number, since it is larger than the sum of its proper divisors (1629).

206971 is a wasteful number, since it uses less digits than its factorization.

206971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 206971 is about 454.9406554706. The cubic root of 206971 is about 59.1520544047.

The spelling of 206971 in words is "two hundred six thousand, nine hundred seventy-one".