194789345 has 4 divisors (see below), whose sum is σ = 233747220. Its totient is φ = 155831472.

The previous prime is 194789341. The next prime is 194789347. The reversal of 194789345 is 543987491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30129121 + 164660224 = 5489^2 + 12832^2 .

It is a cyclic number.

It is not a de Polignac number, because 194789345 - 2² = 194789341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 194789293 and 194789302.

It is not an unprimeable number, because it can be changed into a prime (194789341) 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 3 ways as a sum of consecutive naturals, for example, 19478930 + ... + 19478939.

It is an arithmetic number, because the mean of its divisors is an integer number (58436805).

Almost surely, 2^194789345 is an apocalyptic number.

It is an amenable number.

194789345 is a deficient number, since it is larger than the sum of its proper divisors (38957875).

194789345 is an equidigital number, since it uses as much as digits as its factorization.

194789345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38957874.

The product of its digits is 1088640, while the sum is 50.

The square root of 194789345 is about 13956.6953466786. The cubic root of 194789345 is about 579.6801099675.

The spelling of 194789345 in words is "one hundred ninety-four million, seven hundred eighty-nine thousand, three hundred forty-five".