208620748769 has 2 divisors, whose sum is σ = 208620748770. Its totient is φ = 208620748768.

The previous prime is 208620748741. The next prime is 208620748781. The reversal of 208620748769 is 967847026802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112635414544 + 95985334225 = 335612^2 + 309815^2 .

It is a cyclic number.

It is not a de Polignac number, because 208620748769 - 2³⁶ = 139901272033 is a prime.

It is a super-2 number, since 2×208620748769² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (208620448769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104310374384 + 104310374385.

It is an arithmetic number, because the mean of its divisors is an integer number (104310374385).

Almost surely, 2^208620748769 is an apocalyptic number.

It is an amenable number.

208620748769 is a deficient number, since it is larger than the sum of its proper divisors (1).

208620748769 is an equidigital number, since it uses as much as digits as its factorization.

208620748769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16257024, while the sum is 59.

The spelling of 208620748769 in words is "two hundred eight billion, six hundred twenty million, seven hundred forty-eight thousand, seven hundred sixty-nine".