193989613 has 8 divisors (see below), whose sum is σ = 209404800. Its totient is φ = 179156208.

The previous prime is 193989583. The next prime is 193989623. The reversal of 193989613 is 316989391.

193989613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 193989613 - 2¹⁷ = 193858541 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 (193989623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144753 + ... + 146086.

It is an arithmetic number, because the mean of its divisors is an integer number (26175600).

Almost surely, 2^193989613 is an apocalyptic number.

It is an amenable number.

193989613 is a deficient number, since it is larger than the sum of its proper divisors (15415187).

193989613 is a wasteful number, since it uses less digits than its factorization.

193989613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290891.

The product of its digits is 314928, while the sum is 49.

The square root of 193989613 is about 13928.0154006233. The cubic root of 193989613 is about 578.8857054185.

The spelling of 193989613 in words is "one hundred ninety-three million, nine hundred eighty-nine thousand, six hundred thirteen".