208080857 has 2 divisors, whose sum is σ = 208080858. Its totient is φ = 208080856.

The previous prime is 208080853. The next prime is 208080871. The reversal of 208080857 is 758080802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181413961 + 26666896 = 13469^2 + 5164^2 .

It is a cyclic number.

It is not a de Polignac number, because 208080857 - 2² = 208080853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208080857.

It is not a weakly prime, because it can be changed into another prime (208080853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104040428 + 104040429.

It is an arithmetic number, because the mean of its divisors is an integer number (104040429).

Almost surely, 2^208080857 is an apocalyptic number.

It is an amenable number.

208080857 is a deficient number, since it is larger than the sum of its proper divisors (1).

208080857 is an equidigital number, since it uses as much as digits as its factorization.

208080857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 208080857 is about 14425.0080415922. The cubic root of 208080857 is about 592.5759789098.

Subtracting 208080857 from its reverse (758080802), we obtain a palindrome (549999945).

The spelling of 208080857 in words is "two hundred eight million, eighty thousand, eight hundred fifty-seven".