208973468663 has 4 divisors (see below), whose sum is σ = 208974401688. Its totient is φ = 208972535640.

The previous prime is 208973468653. The next prime is 208973468681. The reversal of 208973468663 is 366864379802.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 208973468663 - 2¹⁶ = 208973403127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 208973468596 and 208973468605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208973468653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93668 + ... + 653238.

It is an arithmetic number, because the mean of its divisors is an integer number (52243600422).

Almost surely, 2^208973468663 is an apocalyptic number.

208973468663 is a deficient number, since it is larger than the sum of its proper divisors (933025).

208973468663 is an equidigital number, since it uses as much as digits as its factorization.

208973468663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933024.

The product of its (nonzero) digits is 62705664, while the sum is 62.

The spelling of 208973468663 in words is "two hundred eight billion, nine hundred seventy-three million, four hundred sixty-eight thousand, six hundred sixty-three".