197789393 has 8 divisors (see below), whose sum is σ = 206081280. Its totient is φ = 189617040.

The previous prime is 197789363. The next prime is 197789401. The reversal of 197789393 is 393987791.

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 197789393 - 2¹⁰ = 197788369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197789303) 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 7 ways as a sum of consecutive naturals, for example, 26498 + ... + 33131.

It is an arithmetic number, because the mean of its divisors is an integer number (25760160).

Almost surely, 2^197789393 is an apocalyptic number.

It is an amenable number.

197789393 is a deficient number, since it is larger than the sum of its proper divisors (8291887).

197789393 is a wasteful number, since it uses less digits than its factorization.

197789393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59767.

The product of its digits is 2571912, while the sum is 56.

The square root of 197789393 is about 14063.7616945112. The cubic root of 197789393 is about 582.6409421515.

The spelling of 197789393 in words is "one hundred ninety-seven million, seven hundred eighty-nine thousand, three hundred ninety-three".