193311984189 has 4 divisors (see below), whose sum is σ = 257749312256. Its totient is φ = 128874656124.

The previous prime is 193311984137. The next prime is 193311984193. The reversal of 193311984189 is 981489113391.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 193311984189 - 2²⁹ = 192775113277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193311984119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32218664029 + ... + 32218664034.

It is an arithmetic number, because the mean of its divisors is an integer number (64437328064).

Almost surely, 2^193311984189 is an apocalyptic number.

It is an amenable number.

193311984189 is a deficient number, since it is larger than the sum of its proper divisors (64437328067).

193311984189 is an equidigital number, since it uses as much as digits as its factorization.

193311984189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64437328066.

The product of its digits is 1679616, while the sum is 57.

The spelling of 193311984189 in words is "one hundred ninety-three billion, three hundred eleven million, nine hundred eighty-four thousand, one hundred eighty-nine".