208938979 has 4 divisors (see below), whose sum is σ = 210093520. Its totient is φ = 207784440.

The previous prime is 208938967. The next prime is 208939009. The reversal of 208938979 is 979839802.

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

It is a cyclic number.

It is not a de Polignac number, because 208938979 - 2⁹ = 208938467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208938929) 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, 576999 + ... + 577360.

It is an arithmetic number, because the mean of its divisors is an integer number (52523380).

Almost surely, 2^208938979 is an apocalyptic number.

208938979 is a deficient number, since it is larger than the sum of its proper divisors (1154541).

208938979 is a wasteful number, since it uses less digits than its factorization.

208938979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154540.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The square root of 208938979 is about 14454.7216853179. The cubic root of 208938979 is about 593.3894528481.

The spelling of 208938979 in words is "two hundred eight million, nine hundred thirty-eight thousand, nine hundred seventy-nine".