193496738789 has 4 divisors (see below), whose sum is σ = 193498526124. Its totient is φ = 193494951456.

The previous prime is 193496738767. The next prime is 193496738797. The reversal of 193496738789 is 987837694391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 987837694391 = 43 ⋅22972969637.

It can be written as a sum of positive squares in 2 ways, for example, as 82446508225 + 111050230564 = 287135^2 + 333242^2 .

It is a cyclic number.

It is not a de Polignac number, because 193496738789 - 2¹² = 193496734693 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 (193496738749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 720032 + ... + 951545.

It is an arithmetic number, because the mean of its divisors is an integer number (48374631531).

Almost surely, 2^193496738789 is an apocalyptic number.

It is an amenable number.

193496738789 is a deficient number, since it is larger than the sum of its proper divisors (1787335).

193496738789 is a wasteful number, since it uses less digits than its factorization.

193496738789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787334.

The product of its digits is 493807104, while the sum is 74.

The spelling of 193496738789 in words is "one hundred ninety-three billion, four hundred ninety-six million, seven hundred thirty-eight thousand, seven hundred eighty-nine".