208349513 has 4 divisors (see below), whose sum is σ = 210193428. Its totient is φ = 206505600.

The previous prime is 208349503. The next prime is 208349521. The reversal of 208349513 is 315943802.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2226064 + 206123449 = 1492^2 + 14357^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208349513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208349503) 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, 921788 + ... + 922013.

It is an arithmetic number, because the mean of its divisors is an integer number (52548357).

Almost surely, 2^208349513 is an apocalyptic number.

It is an amenable number.

208349513 is a deficient number, since it is larger than the sum of its proper divisors (1843915).

208349513 is a wasteful number, since it uses less digits than its factorization.

208349513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843914.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 208349513 is about 14434.3171989533. The cubic root of 208349513 is about 592.8308968439.

The spelling of 208349513 in words is "two hundred eight million, three hundred forty-nine thousand, five hundred thirteen".