206408473 has 4 divisors (see below), whose sum is σ = 211442868. Its totient is φ = 201374080.

The previous prime is 206408413. The next prime is 206408483. The reversal of 206408473 is 374804602.

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

It can be written as a sum of positive squares in 2 ways, for example, as 80138304 + 126270169 = 8952^2 + 11237^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206408473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206408413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2517136 + ... + 2517217.

It is an arithmetic number, because the mean of its divisors is an integer number (52860717).

Almost surely, 2^206408473 is an apocalyptic number.

It is an amenable number.

206408473 is a deficient number, since it is larger than the sum of its proper divisors (5034395).

206408473 is an equidigital number, since it uses as much as digits as its factorization.

206408473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5034394.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 206408473 is about 14366.9228786125. The cubic root of 206408473 is about 590.9841594162.

The spelling of 206408473 in words is "two hundred six million, four hundred eight thousand, four hundred seventy-three".