208996204789 has 2 divisors, whose sum is σ = 208996204790. Its totient is φ = 208996204788.

The previous prime is 208996204763. The next prime is 208996204819. The reversal of 208996204789 is 987402699802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207375498225 + 1620706564 = 455385^2 + 40258^2 .

It is a cyclic number.

It is not a de Polignac number, because 208996204789 - 2¹⁷ = 208996073717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208996204789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208996204709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104498102394 + 104498102395.

It is an arithmetic number, because the mean of its divisors is an integer number (104498102395).

Almost surely, 2^208996204789 is an apocalyptic number.

It is an amenable number.

208996204789 is a deficient number, since it is larger than the sum of its proper divisors (1).

208996204789 is an equidigital number, since it uses as much as digits as its factorization.

208996204789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31352832, while the sum is 64.

The spelling of 208996204789 in words is "two hundred eight billion, nine hundred ninety-six million, two hundred four thousand, seven hundred eighty-nine".