193742193839 has 4 divisors (see below), whose sum is σ = 197864368224. Its totient is φ = 189620019456.

The previous prime is 193742193769. The next prime is 193742193847. The reversal of 193742193839 is 938391247391.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 193742193839 - 2²⁸ = 193473758383 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 (193742190839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2061087122 + ... + 2061087215.

It is an arithmetic number, because the mean of its divisors is an integer number (49466092056).

Almost surely, 2^193742193839 is an apocalyptic number.

193742193839 is a deficient number, since it is larger than the sum of its proper divisors (4122174385).

193742193839 is an equidigital number, since it uses as much as digits as its factorization.

193742193839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4122174384.

The product of its digits is 8817984, while the sum is 59.

The spelling of 193742193839 in words is "one hundred ninety-three billion, seven hundred forty-two million, one hundred ninety-three thousand, eight hundred thirty-nine".