199997369 has 24 divisors (see below), whose sum is σ = 243489792. Its totient is φ = 161945280.

The previous prime is 199997341. The next prime is 199997377. The reversal of 199997369 is 963799991.

It is not a de Polignac number, because 199997369 - 2⁸ = 199997113 is a prime.

It is a super-2 number, since 2×199997369² = 79997895213844322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (199997339) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119432 + ... + 121094.

It is an arithmetic number, because the mean of its divisors is an integer number (10145408).

Almost surely, 2^199997369 is an apocalyptic number.

It is an amenable number.

199997369 is a deficient number, since it is larger than the sum of its proper divisors (43492423).

199997369 is a wasteful number, since it uses less digits than its factorization.

199997369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745 (or 1716 counting only the distinct ones).

The product of its digits is 7440174, while the sum is 62.

The square root of 199997369 is about 14142.0426035280. The cubic root of 199997369 is about 584.8009832678.

The spelling of 199997369 in words is "one hundred ninety-nine million, nine hundred ninety-seven thousand, three hundred sixty-nine".