208916955 has 48 divisors (see below), whose sum is σ = 402219360. Its totient is φ = 102840192.

The previous prime is 208916941. The next prime is 208916959. The reversal of 208916955 is 559619802.

It is not a de Polignac number, because 208916955 - 2¹¹ = 208914907 is a prime.

It is a super-4 number, since 4×208916955⁴ (a number of 34 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 208916955.

It is not an unprimeable number, because it can be changed into a prime (208916959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18237 + ... + 27393.

It is an arithmetic number, because the mean of its divisors is an integer number (8379570).

Almost surely, 2^208916955 is an apocalyptic number.

208916955 is a deficient number, since it is larger than the sum of its proper divisors (193302405).

208916955 is a wasteful number, since it uses less digits than its factorization.

208916955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9197 (or 9178 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 208916955 is about 14453.9598380513. The cubic root of 208916955 is about 593.3686026321.

It can be divided in two parts, 2089 and 16955, that added together give a square (19044 = 138²).

The spelling of 208916955 in words is "two hundred eight million, nine hundred sixteen thousand, nine hundred fifty-five".