208001097 has 12 divisors (see below), whose sum is σ = 306115524. Its totient is φ = 136050720.

The previous prime is 208001089. The next prime is 208001111. The reversal of 208001097 is 790100802.

It can be written as a sum of positive squares in 2 ways, for example, as 135001161 + 72999936 = 11619^2 + 8544^2 .

It is not a de Polignac number, because 208001097 - 2³ = 208001089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208001097.

It is not an unprimeable number, because it can be changed into a prime (208003097) 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 11 ways as a sum of consecutive naturals, for example, 217554 + ... + 218507.

It is an arithmetic number, because the mean of its divisors is an integer number (25509627).

Almost surely, 2^208001097 is an apocalyptic number.

It is an amenable number.

208001097 is a deficient number, since it is larger than the sum of its proper divisors (98114427).

208001097 is a wasteful number, since it uses less digits than its factorization.

208001097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436120 (or 436117 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 208001097 is about 14422.2431334380. The cubic root of 208001097 is about 592.5002553009.

Adding to 208001097 its reverse (790100802), we get a palindrome (998101899).

The spelling of 208001097 in words is "two hundred eight million, one thousand, ninety-seven".