193090449217 has 2 divisors, whose sum is σ = 193090449218. Its totient is φ = 193090449216.

The previous prime is 193090449203. The next prime is 193090449259. The reversal of 193090449217 is 712944090391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167935220401 + 25155228816 = 409799^2 + 158604^2 .

It is a cyclic number.

It is not a de Polignac number, because 193090449217 - 2¹¹ = 193090447169 is a prime.

It is not a weakly prime, because it can be changed into another prime (193090449317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96545224608 + 96545224609.

It is an arithmetic number, because the mean of its divisors is an integer number (96545224609).

Almost surely, 2^193090449217 is an apocalyptic number.

It is an amenable number.

193090449217 is a deficient number, since it is larger than the sum of its proper divisors (1).

193090449217 is an equidigital number, since it uses as much as digits as its factorization.

193090449217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 193090449217 in words is "one hundred ninety-three billion, ninety million, four hundred forty-nine thousand, two hundred seventeen".