208585474271947 has 2 divisors, whose sum is σ = 208585474271948. Its totient is φ = 208585474271946.

The previous prime is 208585474271893. The next prime is 208585474272001. The reversal of 208585474271947 is 749172474585802.

It is a balanced prime because it is at equal distance from previous prime (208585474271893) and next prime (208585474272001).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208585474271947 is a prime.

It is a super-2 number, since 2×208585474271947² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 208585474271947.

It is not a weakly prime, because it can be changed into another prime (208585474221947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104292737135973 + 104292737135974.

It is an arithmetic number, because the mean of its divisors is an integer number (104292737135974).

Almost surely, 2^{208585474271947} is an apocalyptic number.

208585474271947 is a deficient number, since it is larger than the sum of its proper divisors (1).

208585474271947 is an equidigital number, since it uses as much as digits as its factorization.

208585474271947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1264435200, while the sum is 73.

The spelling of 208585474271947 in words is "two hundred eight trillion, five hundred eighty-five billion, four hundred seventy-four million, two hundred seventy-one thousand, nine hundred forty-seven".