193620915913 has 2 divisors, whose sum is σ = 193620915914. Its totient is φ = 193620915912.

The previous prime is 193620915841. The next prime is 193620915959. The reversal of 193620915913 is 319519026391.

It is a happy number.

193620915913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137293963024 + 56326952889 = 370532^2 + 237333^2 .

It is a cyclic number.

It is not a de Polignac number, because 193620915913 - 2⁹ = 193620915401 is a prime.

It is not a weakly prime, because it can be changed into another prime (193620915413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96810457956 + 96810457957.

It is an arithmetic number, because the mean of its divisors is an integer number (96810457957).

Almost surely, 2^193620915913 is an apocalyptic number.

It is an amenable number.

193620915913 is a deficient number, since it is larger than the sum of its proper divisors (1).

193620915913 is an equidigital number, since it uses as much as digits as its factorization.

193620915913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 393660, while the sum is 49.

The spelling of 193620915913 in words is "one hundred ninety-three billion, six hundred twenty million, nine hundred fifteen thousand, nine hundred thirteen".