208274082857 has 2 divisors, whose sum is σ = 208274082858. Its totient is φ = 208274082856.

The previous prime is 208274082853. The next prime is 208274082869. The reversal of 208274082857 is 758280472802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188337772441 + 19936310416 = 433979^2 + 141196^2 .

It is a cyclic number.

It is not a de Polignac number, because 208274082857 - 2² = 208274082853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 208274082799 and 208274082808.

It is not a weakly prime, because it can be changed into another prime (208274082853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104137041428 + 104137041429.

It is an arithmetic number, because the mean of its divisors is an integer number (104137041429).

Almost surely, 2^208274082857 is an apocalyptic number.

It is an amenable number.

208274082857 is a deficient number, since it is larger than the sum of its proper divisors (1).

208274082857 is an equidigital number, since it uses as much as digits as its factorization.

208274082857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4014080, while the sum is 53.

The spelling of 208274082857 in words is "two hundred eight billion, two hundred seventy-four million, eighty-two thousand, eight hundred fifty-seven".