206761 has 4 divisors (see below), whose sum is σ = 208000. Its totient is φ = 205524.

The previous prime is 206749. The next prime is 206779. The reversal of 206761 is 167602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206761 - 2⁹ = 206249 is a prime.

It is a super-2 number, since 2×206761² = 85500222242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206461) 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, 321 + ... + 718.

It is an arithmetic number, because the mean of its divisors is an integer number (52000).

2²⁰⁶⁷⁶¹ is an apocalyptic number.

It is an amenable number.

206761 is a deficient number, since it is larger than the sum of its proper divisors (1239).

206761 is a wasteful number, since it uses less digits than its factorization.

206761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 206761 is about 454.7097975632. The cubic root of 206761 is about 59.1320417217.

The spelling of 206761 in words is "two hundred six thousand, seven hundred sixty-one".