208023539 has 8 divisors (see below), whose sum is σ = 213049440. Its totient is φ = 203056000.

The previous prime is 208023521. The next prime is 208023559. The reversal of 208023539 is 935320802.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208023539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208023559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7334 + ... + 21675.

It is an arithmetic number, because the mean of its divisors is an integer number (26631180).

Almost surely, 2^208023539 is an apocalyptic number.

208023539 is a deficient number, since it is larger than the sum of its proper divisors (5025901).

208023539 is a wasteful number, since it uses less digits than its factorization.

208023539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29181.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 208023539 is about 14423.0211467639. The cubic root of 208023539 is about 592.5215635419.

The spelling of 208023539 in words is "two hundred eight million, twenty-three thousand, five hundred thirty-nine".