208893009289 has 2 divisors, whose sum is σ = 208893009290. Its totient is φ = 208893009288.

The previous prime is 208893009251. The next prime is 208893009313. The reversal of 208893009289 is 982900398802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194774816889 + 14118192400 = 441333^2 + 118820^2 .

It is a cyclic number.

It is not a de Polignac number, because 208893009289 - 2¹⁹ = 208892485001 is a prime.

It is not a weakly prime, because it can be changed into another prime (208893000289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104446504644 + 104446504645.

It is an arithmetic number, because the mean of its divisors is an integer number (104446504645).

Almost surely, 2^208893009289 is an apocalyptic number.

It is an amenable number.

208893009289 is a deficient number, since it is larger than the sum of its proper divisors (1).

208893009289 is an equidigital number, since it uses as much as digits as its factorization.

208893009289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 58.

The spelling of 208893009289 in words is "two hundred eight billion, eight hundred ninety-three million, nine thousand, two hundred eighty-nine".