206080817 has 4 divisors (see below), whose sum is σ = 218203236. Its totient is φ = 193958400.

The previous prime is 206080807. The next prime is 206080841. The reversal of 206080817 is 718080602.

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 60902416 + 145178401 = 7804^2 + 12049^2 .

It is a cyclic number.

It is not a de Polignac number, because 206080817 - 2⁸ = 206080561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206080807) 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 in 3 ways as a sum of consecutive naturals, for example, 6061184 + ... + 6061217.

It is an arithmetic number, because the mean of its divisors is an integer number (54550809).

Almost surely, 2^206080817 is an apocalyptic number.

It is an amenable number.

206080817 is a deficient number, since it is larger than the sum of its proper divisors (12122419).

206080817 is a wasteful number, since it uses less digits than its factorization.

206080817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12122418.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 206080817 is about 14355.5152119316. The cubic root of 206080817 is about 590.6712813392.

The spelling of 206080817 in words is "two hundred six million, eighty thousand, eight hundred seventeen".