206447 has 2 divisors, whose sum is σ = 206448. Its totient is φ = 206446.

The previous prime is 206419. The next prime is 206461. The reversal of 206447 is 744602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206447 - 2⁶ = 206383 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 206447.

It is not a weakly prime, because it can be changed into another prime (206407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103223 + 103224.

It is an arithmetic number, because the mean of its divisors is an integer number (103224).

2²⁰⁶⁴⁴⁷ is an apocalyptic number.

206447 is a deficient number, since it is larger than the sum of its proper divisors (1).

206447 is an equidigital number, since it uses as much as digits as its factorization.

206447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 206447 is about 454.3643912104. The cubic root of 206447 is about 59.1020927012.

The spelling of 206447 in words is "two hundred six thousand, four hundred forty-seven".