208913 has 4 divisors (see below), whose sum is σ = 221220. Its totient is φ = 196608.

The previous prime is 208907. The next prime is 208927. The reversal of 208913 is 319802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 165649 + 43264 = 407^2 + 208^2 .

It is a cyclic number.

It is not a de Polignac number, because 208913 - 2⁸ = 208657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6128 + ... + 6161.

It is an arithmetic number, because the mean of its divisors is an integer number (55305).

2²⁰⁸⁹¹³ is an apocalyptic number.

It is an amenable number.

208913 is a deficient number, since it is larger than the sum of its proper divisors (12307).

208913 is a wasteful number, since it uses less digits than its factorization.

208913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12306.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 208913 is about 457.0700165183. The cubic root of 208913 is about 59.3364858261.

Subtracting 208913 from its reverse (319802), we obtain a square (110889 = 333²).

The spelling of 208913 in words is "two hundred eight thousand, nine hundred thirteen".