208406938873 has 8 divisors (see below), whose sum is σ = 238700542592. Its totient is φ = 178243631136.

The previous prime is 208406938867. The next prime is 208406938889. The reversal of 208406938873 is 378839604802.

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

It is a cyclic number.

It is not a de Polignac number, because 208406938873 - 2⁵ = 208406938841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208406938073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32570565 + ... + 32576962.

It is an arithmetic number, because the mean of its divisors is an integer number (29837567824).

Almost surely, 2^208406938873 is an apocalyptic number.

It is an amenable number.

208406938873 is a deficient number, since it is larger than the sum of its proper divisors (30293603719).

208406938873 is an equidigital number, since it uses as much as digits as its factorization.

208406938873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65147991.

The product of its (nonzero) digits is 13934592, while the sum is 58.

The spelling of 208406938873 in words is "two hundred eight billion, four hundred six million, nine hundred thirty-eight thousand, eight hundred seventy-three".