193801993 has 16 divisors (see below), whose sum is σ = 242657280. Its totient is φ = 150368400.

The previous prime is 193801991. The next prime is 193801999. The reversal of 193801993 is 399108391.

193801993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 193801993 - 2¹ = 193801991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (193801991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13138 + ... + 23668.

It is an arithmetic number, because the mean of its divisors is an integer number (15166080).

Almost surely, 2^193801993 is an apocalyptic number.

It is an amenable number.

193801993 is a deficient number, since it is larger than the sum of its proper divisors (48855287).

193801993 is a wasteful number, since it uses less digits than its factorization.

193801993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10788.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 193801993 is about 13921.2784254895. The cubic root of 193801993 is about 578.6990191866.

The spelling of 193801993 in words is "one hundred ninety-three million, eight hundred one thousand, nine hundred ninety-three".