208964805 has 16 divisors (see below), whose sum is σ = 382107264. Its totient is φ = 95526720.

The previous prime is 208964803. The next prime is 208964837. The reversal of 208964805 is 508469802.

It is not a de Polignac number, because 208964805 - 2¹ = 208964803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208964801) 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 15 ways as a sum of consecutive naturals, for example, 994966 + ... + 995175.

It is an arithmetic number, because the mean of its divisors is an integer number (23881704).

Almost surely, 2^208964805 is an apocalyptic number.

It is an amenable number.

208964805 is a deficient number, since it is larger than the sum of its proper divisors (173142459).

208964805 is a wasteful number, since it uses less digits than its factorization.

208964805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990156.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 208964805 is about 14455.6149990237. The cubic root of 208964805 is about 593.4139005676.

The spelling of 208964805 in words is "two hundred eight million, nine hundred sixty-four thousand, eight hundred five".