206849 has 4 divisors (see below), whose sum is σ = 208560. Its totient is φ = 205140.

The previous prime is 206827. The next prime is 206879. The reversal of 206849 is 948602.

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 206849 - 2⁸ = 206593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659 + ... + 920.

It is an arithmetic number, because the mean of its divisors is an integer number (52140).

It is a Proth number, since it is equal to 101 ⋅ 2¹¹ + 1 and 101 < 2¹¹.

2²⁰⁶⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

206849 is a deficient number, since it is larger than the sum of its proper divisors (1711).

206849 is a wasteful number, since it uses less digits than its factorization.

206849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 206849 is about 454.8065522835. The cubic root of 206849 is about 59.1404296376.

The spelling of 206849 in words is "two hundred six thousand, eight hundred forty-nine".