208763161 has 2 divisors, whose sum is σ = 208763162. Its totient is φ = 208763160.

The previous prime is 208763129. The next prime is 208763173. The reversal of 208763161 is 161367802.

208763161 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., 205377561 + 3385600 = 14331^2 + 1840^2 .

It is a cyclic number.

It is not a de Polignac number, because 208763161 - 2⁵ = 208763129 is a prime.

It is not a weakly prime, because it can be changed into another prime (208763101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104381580 + 104381581.

It is an arithmetic number, because the mean of its divisors is an integer number (104381581).

Almost surely, 2^208763161 is an apocalyptic number.

It is an amenable number.

208763161 is a deficient number, since it is larger than the sum of its proper divisors (1).

208763161 is an equidigital number, since it uses as much as digits as its factorization.

208763161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 208763161 is about 14448.6387248073. The cubic root of 208763161 is about 593.2229643284. Note that the first 3 decimals are identical.

The spelling of 208763161 in words is "two hundred eight million, seven hundred sixty-three thousand, one hundred sixty-one".