208368013 has 4 divisors (see below), whose sum is σ = 238134880. Its totient is φ = 178601148.

The previous prime is 208368001. The next prime is 208368037. The reversal of 208368013 is 310863802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 208368013 - 2⁹ = 208367501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208368613) 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, 14883423 + ... + 14883436.

It is an arithmetic number, because the mean of its divisors is an integer number (59533720).

Almost surely, 2^208368013 is an apocalyptic number.

It is an amenable number.

208368013 is a deficient number, since it is larger than the sum of its proper divisors (29766867).

208368013 is an equidigital number, since it uses as much as digits as its factorization.

208368013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29766866.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 208368013 is about 14434.9580186435. The cubic root of 208368013 is about 592.8484427564.

The spelling of 208368013 in words is "two hundred eight million, three hundred sixty-eight thousand, thirteen".