193138933 has 32 divisors (see below), whose sum is σ = 227082240. Its totient is φ = 162751680.

The previous prime is 193138909. The next prime is 193138949. The reversal of 193138933 is 339831391.

It is a de Polignac number, because none of the positive numbers 2^k-193138933 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193138133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1474278 + ... + 1474408.

It is an arithmetic number, because the mean of its divisors is an integer number (7096320).

Almost surely, 2^193138933 is an apocalyptic number.

193138933 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

193138933 is a deficient number, since it is larger than the sum of its proper divisors (33943307).

193138933 is a wasteful number, since it uses less digits than its factorization.

193138933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337.

The product of its digits is 52488, while the sum is 40.

The square root of 193138933 is about 13897.4433979779. The cubic root of 193138933 is about 578.0382922233.

The spelling of 193138933 in words is "one hundred ninety-three million, one hundred thirty-eight thousand, nine hundred thirty-three".