208538503387 has 8 divisors (see below), whose sum is σ = 211403404800. Its totient is φ = 205681992360.

The previous prime is 208538503337. The next prime is 208538503427. The reversal of 208538503387 is 783305835802.

208538503387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-208538503387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208538503337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2047539 + ... + 2146972.

It is an arithmetic number, because the mean of its divisors is an integer number (26425425600).

Almost surely, 2^208538503387 is an apocalyptic number.

208538503387 is a deficient number, since it is larger than the sum of its proper divisors (2864901413).

208538503387 is an equidigital number, since it uses as much as digits as its factorization.

208538503387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4195193.

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 208538503387 in words is "two hundred eight billion, five hundred thirty-eight million, five hundred three thousand, three hundred eighty-seven".