208971473 has 2 divisors, whose sum is σ = 208971474. Its totient is φ = 208971472.

The previous prime is 208971437. The next prime is 208971533. The reversal of 208971473 is 374179802.

208971473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (208971437) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116273089 + 92698384 = 10783^2 + 9628^2 .

It is a cyclic number.

It is not a de Polignac number, because 208971473 - 2¹⁰ = 208970449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208971473.

It is not a weakly prime, because it can be changed into another prime (208971173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104485736 + 104485737.

It is an arithmetic number, because the mean of its divisors is an integer number (104485737).

Almost surely, 2^208971473 is an apocalyptic number.

It is an amenable number.

208971473 is a deficient number, since it is larger than the sum of its proper divisors (1).

208971473 is an equidigital number, since it uses as much as digits as its factorization.

208971473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 208971473 is about 14455.8456342063. The cubic root of 208971473 is about 593.4202123829.

The spelling of 208971473 in words is "two hundred eight million, nine hundred seventy-one thousand, four hundred seventy-three".