193305553913 has 2 divisors, whose sum is σ = 193305553914. Its totient is φ = 193305553912.

The previous prime is 193305553879. The next prime is 193305553921. The reversal of 193305553913 is 319355503391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193245522409 + 60031504 = 439597^2 + 7748^2 .

It is a cyclic number.

It is not a de Polignac number, because 193305553913 - 2³⁴ = 176125684729 is a prime.

It is a super-2 number, since 2×193305553913² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (193305553943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96652776956 + 96652776957.

It is an arithmetic number, because the mean of its divisors is an integer number (96652776957).

Almost surely, 2^193305553913 is an apocalyptic number.

It is an amenable number.

193305553913 is a deficient number, since it is larger than the sum of its proper divisors (1).

193305553913 is an equidigital number, since it uses as much as digits as its factorization.

193305553913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 820125, while the sum is 47.

The spelling of 193305553913 in words is "one hundred ninety-three billion, three hundred five million, five hundred fifty-three thousand, nine hundred thirteen".