193394813 has 8 divisors (see below), whose sum is σ = 194676480. Its totient is φ = 192117760.

The previous prime is 193394809. The next prime is 193394837. The reversal of 193394813 is 318493391.

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

It is a cyclic number.

It is not a de Polignac number, because 193394813 - 2² = 193394809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193394843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122318 + ... + 123888.

It is an arithmetic number, because the mean of its divisors is an integer number (24334560).

Almost surely, 2^193394813 is an apocalyptic number.

It is an amenable number.

193394813 is a deficient number, since it is larger than the sum of its proper divisors (1281667).

193394813 is a wasteful number, since it uses less digits than its factorization.

193394813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2307.

The product of its digits is 69984, while the sum is 41.

The square root of 193394813 is about 13906.6463606435. The cubic root of 193394813 is about 578.2934508029.

The spelling of 193394813 in words is "one hundred ninety-three million, three hundred ninety-four thousand, eight hundred thirteen".