193481732891 has 2 divisors, whose sum is σ = 193481732892. Its totient is φ = 193481732890.

The previous prime is 193481732867. The next prime is 193481732909. The reversal of 193481732891 is 198237184391.

193481732891 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 is a cyclic number.

It is not a de Polignac number, because 193481732891 - 2¹⁴ = 193481716507 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (193481735891) 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, 96740866445 + 96740866446.

It is an arithmetic number, because the mean of its divisors is an integer number (96740866446).

Almost surely, 2^193481732891 is an apocalyptic number.

193481732891 is a deficient number, since it is larger than the sum of its proper divisors (1).

193481732891 is an equidigital number, since it uses as much as digits as its factorization.

193481732891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 56.

The spelling of 193481732891 in words is "one hundred ninety-three billion, four hundred eighty-one million, seven hundred thirty-two thousand, eight hundred ninety-one".