208017013 has 4 divisors (see below), whose sum is σ = 208381888. Its totient is φ = 207652140.

The previous prime is 208017001. The next prime is 208017031. The reversal of 208017013 is 310710802.

208017013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-208017013 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 (208017053) 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, 181581 + ... + 182722.

It is an arithmetic number, because the mean of its divisors is an integer number (52095472).

Almost surely, 2^208017013 is an apocalyptic number.

It is an amenable number.

208017013 is a deficient number, since it is larger than the sum of its proper divisors (364875).

208017013 is an equidigital number, since it uses as much as digits as its factorization.

208017013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364874.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 208017013 is about 14422.7949094480. The cubic root of 208017013 is about 592.5153673903.

Adding to 208017013 its reverse (310710802), we get a palindrome (518727815).

The spelling of 208017013 in words is "two hundred eight million, seventeen thousand, thirteen".