208955013 has 4 divisors (see below), whose sum is σ = 278606688. Its totient is φ = 139303340.

The previous prime is 208955011. The next prime is 208955029. The reversal of 208955013 is 310559802.

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 208955013 - 2¹ = 208955011 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208955011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34825833 + ... + 34825838.

It is an arithmetic number, because the mean of its divisors is an integer number (69651672).

Almost surely, 2^208955013 is an apocalyptic number.

It is an amenable number.

208955013 is a deficient number, since it is larger than the sum of its proper divisors (69651675).

208955013 is an equidigital number, since it uses as much as digits as its factorization.

208955013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69651674.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 208955013 is about 14455.2763031358. The cubic root of 208955013 is about 593.4046313836.

The spelling of 208955013 in words is "two hundred eight million, nine hundred fifty-five thousand, thirteen".