208164469 has 2 divisors, whose sum is σ = 208164470. Its totient is φ = 208164468.

The previous prime is 208164431. The next prime is 208164491. The reversal of 208164469 is 964461802.

208164469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203490225 + 4674244 = 14265^2 + 2162^2 .

It is a cyclic number.

It is not a de Polignac number, because 208164469 - 2¹¹ = 208162421 is a prime.

It is a super-2 number, since 2×208164469² = 86664892308103922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208164569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104082234 + 104082235.

It is an arithmetic number, because the mean of its divisors is an integer number (104082235).

Almost surely, 2^208164469 is an apocalyptic number.

It is an amenable number.

208164469 is a deficient number, since it is larger than the sum of its proper divisors (1).

208164469 is an equidigital number, since it uses as much as digits as its factorization.

208164469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 208164469 is about 14427.9059118085. The cubic root of 208164469 is about 592.6553388096.

The spelling of 208164469 in words is "two hundred eight million, one hundred sixty-four thousand, four hundred sixty-nine".