193989289 has 8 divisors (see below), whose sum is σ = 215651072. Its totient is φ = 173290320.

The previous prime is 193989283. The next prime is 193989307. The reversal of 193989289 is 982989391.

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 193989289 - 2⁹ = 193988777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (193989283) 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 in 7 ways as a sum of consecutive naturals, for example, 240279 + ... + 241084.

It is an arithmetic number, because the mean of its divisors is an integer number (26956384).

Almost surely, 2^193989289 is an apocalyptic number.

It is an amenable number.

193989289 is a deficient number, since it is larger than the sum of its proper divisors (21661783).

193989289 is a wasteful number, since it uses less digits than its factorization.

193989289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481407.

The product of its digits is 2519424, while the sum is 58.

The square root of 193989289 is about 13928.0037693849. The cubic root of 193989289 is about 578.8853831348.

It can be divided in two parts, 1939 and 89289, that multiplied together give a palindrome (173131371).

The spelling of 193989289 in words is "one hundred ninety-three million, nine hundred eighty-nine thousand, two hundred eighty-nine".