193993994 has 4 divisors (see below), whose sum is σ = 290990994. Its totient is φ = 96996996.

The previous prime is 193993951. The next prime is 193993999. The reversal of 193993994 is 499399391.

It is a happy number.

193993994 is digitally balanced in base 3, 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.

It can be written as a sum of positive squares in only one way, i.e., 156625225 + 37368769 = 12515^2 + 6113^2 .

It is not an unprimeable number, because it can be changed into a prime (193993999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48498497 + ... + 48498500.

Almost surely, 2^193993994 is an apocalyptic number.

193993994 is a deficient number, since it is larger than the sum of its proper divisors (96997000).

193993994 is an equidigital number, since it uses as much as digits as its factorization.

193993994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96996999.

The product of its digits is 2125764, while the sum is 56.

The square root of 193993994 is about 13928.1726726804. The cubic root of 193993994 is about 578.8900631762.

The spelling of 193993994 in words is "one hundred ninety-three million, nine hundred ninety-three thousand, nine hundred ninety-four".