208287313 has 8 divisors (see below), whose sum is σ = 229526528. Its totient is φ = 187793424.

The previous prime is 208287311. The next prime is 208287361. The reversal of 208287313 is 313782802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 208287313 - 2¹ = 208287311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208287311) 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 7 ways as a sum of consecutive naturals, for example, 185745 + ... + 186862.

It is an arithmetic number, because the mean of its divisors is an integer number (28690816).

Almost surely, 2^208287313 is an apocalyptic number.

It is an amenable number.

208287313 is a deficient number, since it is larger than the sum of its proper divisors (21239215).

208287313 is a wasteful number, since it uses less digits than its factorization.

208287313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372663.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 208287313 is about 14432.1624505824. The cubic root of 208287313 is about 592.7718970231.

The spelling of 208287313 in words is "two hundred eight million, two hundred eighty-seven thousand, three hundred thirteen".