208959161 has 2 divisors, whose sum is σ = 208959162. Its totient is φ = 208959160.

The previous prime is 208959151. The next prime is 208959167. The reversal of 208959161 is 161959802.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197936761 + 11022400 = 14069^2 + 3320^2 .

It is a cyclic number.

It is not a de Polignac number, because 208959161 - 2²⁶ = 141850297 is a prime.

It is not a weakly prime, because it can be changed into another prime (208959167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104479580 + 104479581.

It is an arithmetic number, because the mean of its divisors is an integer number (104479581).

Almost surely, 2^208959161 is an apocalyptic number.

It is an amenable number.

208959161 is a deficient number, since it is larger than the sum of its proper divisors (1).

208959161 is an equidigital number, since it uses as much as digits as its factorization.

208959161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 208959161 is about 14455.4197794460. The cubic root of 208959161 is about 593.4085579483.

The spelling of 208959161 in words is "two hundred eight million, nine hundred fifty-nine thousand, one hundred sixty-one".