193493894938 has 8 divisors (see below), whose sum is σ = 293114514420. Its totient is φ = 95789056800.

The previous prime is 193493894879. The next prime is 193493894939. The reversal of 193493894938 is 839498394391.

It can be written as a sum of positive squares in 2 ways, for example, as 127708313769 + 65785581169 = 357363^2 + 256487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (193493894939) 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, 478945083 + ... + 478945486.

Almost surely, 2^193493894938 is an apocalyptic number.

193493894938 is a deficient number, since it is larger than the sum of its proper divisors (99620619482).

193493894938 is a wasteful number, since it uses less digits than its factorization.

193493894938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957890672.

The product of its digits is 181398528, while the sum is 70.

The spelling of 193493894938 in words is "one hundred ninety-three billion, four hundred ninety-three million, eight hundred ninety-four thousand, nine hundred thirty-eight".