208738973 has 4 divisors (see below), whose sum is σ = 208790208. Its totient is φ = 208687740.

The previous prime is 208738967. The next prime is 208738979. The reversal of 208738973 is 379837802.

It is a happy number.

208738973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (208738967) and next prime (208738979).

It is a cyclic number.

It is not a de Polignac number, because 208738973 - 2²⁶ = 141630109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208738979) 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, 18923 + ... + 27848.

It is an arithmetic number, because the mean of its divisors is an integer number (52197552).

Almost surely, 2^208738973 is an apocalyptic number.

It is an amenable number.

208738973 is a deficient number, since it is larger than the sum of its proper divisors (51235).

208738973 is an equidigital number, since it uses as much as digits as its factorization.

208738973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51234.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 208738973 is about 14447.8016666896. The cubic root of 208738973 is about 593.2000525094.

The spelling of 208738973 in words is "two hundred eight million, seven hundred thirty-eight thousand, nine hundred seventy-three".