208971593 has 16 divisors (see below), whose sum is σ = 221348160. Its totient is φ = 196996800.

The previous prime is 208971577. The next prime is 208971611. The reversal of 208971593 is 395179802.

208971593 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 208971593 - 2⁴ = 208971577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208971533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254123 + ... + 254943.

It is an arithmetic number, because the mean of its divisors is an integer number (13834260).

Almost surely, 2^208971593 is an apocalyptic number.

It is an amenable number.

208971593 is a deficient number, since it is larger than the sum of its proper divisors (12376567).

208971593 is a wasteful number, since it uses less digits than its factorization.

208971593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 208971593 is about 14455.8497847757. The cubic root of 208971593 is about 593.4203259717.

The spelling of 208971593 in words is "two hundred eight million, nine hundred seventy-one thousand, five hundred ninety-three".