193247393893 has 2 divisors, whose sum is σ = 193247393894. Its totient is φ = 193247393892.

The previous prime is 193247393891. The next prime is 193247393923. The reversal of 193247393893 is 398393742391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103653734209 + 89593659684 = 321953^2 + 299322^2 .

It is a cyclic number.

It is not a de Polignac number, because 193247393893 - 2¹ = 193247393891 is a prime.

Together with 193247393891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193247393891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96623696946 + 96623696947.

It is an arithmetic number, because the mean of its divisors is an integer number (96623696947).

Almost surely, 2^193247393893 is an apocalyptic number.

It is an amenable number.

193247393893 is a deficient number, since it is larger than the sum of its proper divisors (1).

193247393893 is an equidigital number, since it uses as much as digits as its factorization.

193247393893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26453952, while the sum is 61.

The spelling of 193247393893 in words is "one hundred ninety-three billion, two hundred forty-seven million, three hundred ninety-three thousand, eight hundred ninety-three".