193994413 has 4 divisors (see below), whose sum is σ = 196889920. Its totient is φ = 191098908.

The previous prime is 193994401. The next prime is 193994417. The reversal of 193994413 is 314499391.

193994413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-193994413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 193994413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193994417) 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, 1447653 + ... + 1447786.

It is an arithmetic number, because the mean of its divisors is an integer number (49222480).

Almost surely, 2^193994413 is an apocalyptic number.

It is an amenable number.

193994413 is a deficient number, since it is larger than the sum of its proper divisors (2895507).

193994413 is an equidigital number, since it uses as much as digits as its factorization.

193994413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895506.

The product of its digits is 104976, while the sum is 43.

The square root of 193994413 is about 13928.1877141285. The cubic root of 193994413 is about 578.8904799499.

The spelling of 193994413 in words is "one hundred ninety-three million, nine hundred ninety-four thousand, four hundred thirteen".