209009225098073 has 2 divisors, whose sum is σ = 209009225098074. Its totient is φ = 209009225098072.

The previous prime is 209009225098067. The next prime is 209009225098099. The reversal of 209009225098073 is 370890522900902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187853668464784 + 21155556633289 = 13705972^2 + 4599517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-209009225098073 is a prime.

It is not a weakly prime, because it can be changed into another prime (209009225098043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104504612549036 + 104504612549037.

It is an arithmetic number, because the mean of its divisors is an integer number (104504612549037).

Almost surely, 2^{209009225098073} is an apocalyptic number.

It is an amenable number.

209009225098073 is a deficient number, since it is larger than the sum of its proper divisors (1).

209009225098073 is an equidigital number, since it uses as much as digits as its factorization.

209009225098073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 56.

Adding to 209009225098073 its reverse (370890522900902), we get a palindrome (579899747998975).

The spelling of 209009225098073 in words is "two hundred nine trillion, nine billion, two hundred twenty-five million, ninety-eight thousand, seventy-three".