208906065 has 24 divisors (see below), whose sum is σ = 362501568. Its totient is φ = 111294240.

The previous prime is 208906043. The next prime is 208906073. The reversal of 208906065 is 560609802.

It is not a de Polignac number, because 208906065 - 2⁶ = 208906001 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51460 + ... + 55370.

It is an arithmetic number, because the mean of its divisors is an integer number (15104232).

Almost surely, 2^208906065 is an apocalyptic number.

It is an amenable number.

208906065 is a deficient number, since it is larger than the sum of its proper divisors (153595503).

208906065 is a wasteful number, since it uses less digits than its factorization.

208906065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5109 (or 5106 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 208906065 is about 14453.5831197665. The cubic root of 208906065 is about 593.3582924806.

The spelling of 208906065 in words is "two hundred eight million, nine hundred six thousand, sixty-five".