193504169393 has 2 divisors, whose sum is σ = 193504169394. Its totient is φ = 193504169392.

The previous prime is 193504169371. The next prime is 193504169413. The reversal of 193504169393 is 393961405391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178382056609 + 15122112784 = 422353^2 + 122972^2 .

It is an emirp because it is prime and its reverse (393961405391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 193504169393 - 2¹⁶ = 193504103857 is a prime.

It is not a weakly prime, because it can be changed into another prime (193504169333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96752084696 + 96752084697.

It is an arithmetic number, because the mean of its divisors is an integer number (96752084697).

Almost surely, 2^193504169393 is an apocalyptic number.

It is an amenable number.

193504169393 is a deficient number, since it is larger than the sum of its proper divisors (1).

193504169393 is an equidigital number, since it uses as much as digits as its factorization.

193504169393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2361960, while the sum is 53.

The spelling of 193504169393 in words is "one hundred ninety-three billion, five hundred four million, one hundred sixty-nine thousand, three hundred ninety-three".