199444565 has 16 divisors (see below), whose sum is σ = 246250368. Its totient is φ = 155004096.

The previous prime is 199444543. The next prime is 199444589. The reversal of 199444565 is 565444991.

199444565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 199444565 - 2¹² = 199440469 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23642 + ... + 30948.

It is an arithmetic number, because the mean of its divisors is an integer number (15390648).

Almost surely, 2^199444565 is an apocalyptic number.

It is an amenable number.

199444565 is a deficient number, since it is larger than the sum of its proper divisors (46805803).

199444565 is a wasteful number, since it uses less digits than its factorization.

199444565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7468.

The product of its digits is 777600, while the sum is 47.

The square root of 199444565 is about 14122.4843777573. The cubic root of 199444565 is about 584.2616784466.

The spelling of 199444565 in words is "one hundred ninety-nine million, four hundred forty-four thousand, five hundred sixty-five".